• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Geometric quantities of lower doubly excited bound states of helium

    2022-03-12 07:47:18ChengdongZhou周成棟YuewuYu余岳武SanjiangYang楊三江andHaoxueQiao喬豪學
    Chinese Physics B 2022年3期
    關鍵詞:三江

    Chengdong Zhou(周成棟) Yuewu Yu(余岳武) Sanjiang Yang(楊三江) and Haoxue Qiao(喬豪學)

    1School of Physics and Technology,Wuhan University,Wuhan 430072,China

    2College of Physics and Electronic Science,Hubei Normal University,Huangshi 435002,China

    Keywords: doubly excited states,unnatural parity,Hylleraas-B-spline,geometric quantities

    1. Introduction

    The first evidence of existence of doubly excited states(DESs)is the observation of a line of 32.079 nm in the emission spectrum of helium by Comptom and Boyce.[1]Kruger attributed it to the transition between the 2p23Peand 1s2p3Postates two years later,[2]and it was confirmed by Wu soon.[3]The existence of DESs of helium has stimulated plenty of research. For example, Hilgeret al.using the Hylleraas basis presented precise energy levels of1,3Pestates of helium below the second ionization threshold of He+.[4]Using the complex-rotation method,Ho and Bhatia calculated resonance parameters of1,3Peand1,3Dostates of helium-like systems below theN= 3-5 threshold of He+.[5,6]These3Pestates were also calculated by Saha and Mukherjee using the stabilization method.[7]However, there are some discrepancies between the results presented by Sahaet al.[7]and by Hilgeret al.[4]and Hoet al.[5]To make the reason of discrepancies clear,Kar and Ho[8]recalculated resonance parameters of3Pestates of helium using both complex-rotation method and stabilization method with correlated exponential wavefunctions.Their results are consistent with Hilgeret al.[4]and Hoet al.[5]Using spectral approach,Eilglsperger presented a wide range of energy levels for meta-stable bound states1,3Lwith total angular momentumL=1-9,and of resonance parameters for resonance1,3Pestates belowN=3-5 threshold of He+.[9,10]

    Besides the resonance parameters, geometric quantities are also important physical quantities describing information of states, such as〈r〉,〈r12〉,〈r<〉,〈r>〉,〈cosθ12〉and〈θ12〉,which represent electron-nucleus radial distance, interelectronic radial distance, radial distance between inner electron and nucleus, radial distance between outer electron and nucleus, cosine of interelectronic angle and interelectronic angle,respectively. The〈r>〉could be used to estimate the resonance general size and to distinguish the difference resonance states series of H-.[11,12]In addition,〈r<〉,〈r>〉and〈cosθ12〉could be used to construct the Lewis structures for resonance states.[13]Angular quantities〈θ12〉,〈cosθ12〉could be used to study the resonance parameters of plasma-embedded helium.[14]The interference phenomena between difference resonance series could also be described by these geometic quantities.[13]Systemically investigations on expectation values of these geometric quantities for ground and singly excited states of two-electron systems was completed based on the HF and MCHF methods by Koga group,[15-18]and based on full STO-CI framework and Hylleraas-CI method by Jiao.[19,20]Kogaet al.also pointed out that for singlet and triplet singly excited states,〈r〉and〈r12〉could be fitted into nearly linear law formulas.[18]However, to our best knowledge, the works focusing on geometric quantities of DESs of two-electron systems are relatively rare. In this work, we calculate the geometric quantities of1,3Peand1,3Dostates of helium based on Hylleraas configuration interaction approach using the Hylleraas-B-spline(H-B-spline)basis. These states are doubly excited, which indicates that the wavefunctions distribute in a wider radial range. The variational basis should have good fitting abilities. On another hand, precise calculations on lower lying states needs large partialwave expansion. Recently, Yanget al.introduced a convenient basis set,called the H-B-spline basis,by integrating ther12=|r1-r2|factor in theB-spline basis.[21]This basis inherits the virtue of traditionalB-spline basis,the high localization of each spline, and also has the ability of describing the behavior of wavefunctions at two-electron coalescences, which improves greatly the rate of convergence in partial-wave expansion. The H-B-spline basis was successfully applied to calculation on polarizabilities, magic wavelengths and Bethe logarithm of helium.[21-23]Here we will use this basis to calculate DESs, 2pnp1Pe(3≤n ≤5),2pnp3Pe(2≤n ≤5)and 2pnd1,3Do(3≤n ≤5),of helium.

    This article is organized as follows. Section 2 includes a brief introduction of the H-B-spline basis and the computational methodology in calculating geometric quantities. Convergence studies of energy levels and geometric quantities of 2pnp1Pe(3≤n ≤5),2pnp3Pe(2≤n ≤5) and 2pnd1,3Do(3≤n ≤5)states are presented in Section 3. Discussion are made in this section as well. Finally, a summary is given in Section 4. Atomic units are used throughout this article.

    2. Theoretical method

    2.1. Hylleraas-B-spine basis

    The nonrelativistic Hamiltonian of helium in center-ofmass frame after eliminating system global motion is given by

    Hereqandkare summation indexes which rank from zero toc/2 and zero toc/2-qfor evencor from zero to infinity and zero to(c+1)/2 for oddc;tis continued product index,Sqc=min(q-1,(c+1)/2)is the upper limit value of continued product, andG1represents angular integral parts which are reduced from the summation of Wigner 3jsymbol,

    Herebis equal tol2+1 whenT1=l2-1,or equal to-l2whenT2=l2+1,T1andT2are summation indexes, and (T1,T2) is brief denotation of(2T1+1)(2T2+1).

    2.2. Geometric quantities

    The evaluation of quantities〈r〉,〈r12〉,〈r<〉,〈r>〉,〈cosθ12〉and〈θ12〉could be dealt by including corresponding term intoOIJ. For angular quantities〈θ12〉,the multipole expansion method is adopted to investigate its expectation values

    This angular integral part is similar to Eq. (10), which just needs to adjust the number 1 tokin all Wigner 3jand 6jsymbols.

    3. Results and discussions

    3.1. Energy levels

    Table 1 shows a convergence study of energy level for doubly excited 2p23Pestate of helium with increasing total number ofB-splineNand partial-wave expansion lengthlmax.As shown in this table, the results of this state converge toE=-0.7105001556 whenlmax=4. The extrapolated energy level of this state isE=-0.71050015567(1), which has 11 significant digits and are consistent with precise valuesE=-0.7105001556783 andE=-0.71050015567833 obtained from the exponential correlated basis[25]and the extensive Hylleraas-CI method.[4]

    Table 1. Convergence study of the energy level for the 2p23Pe state of helium as the total number of B-splines N and the partial-wave expansion length lmax increase. The numbers in parentheses of the extrapolated values are the computational uncertainties. Here all the data are in units of a.u.

    Table 2 displays our extrapolated energy levels for 2pnp1Pe(3≤n ≤5) and 2pnp3Pe(2≤n ≤5) states. Comparisons with other precise results are available. Reference data a come from the results of Eiglspergeret al.calculated with Coulomb-Sturmian basis CI method.[9]Reference data b represent results from Kar and Ho using exponential correlated wave functions.[25]Reference data c are obtained by Hilger using extensive Hylleraas-CI calculation.[4]Our results are more consistent with reference data c which are the most accurate known results for these nonautoionization states. Compared to reference data a, Our results have 2 significant digits more precise for 2pnp1Pewithn=3,4,and 4 significant digits for 2p4p3Pestates.

    Table 2. Extrapolated energy levels of doubly excited bound 2pnp1Pe(3 ≤n ≤5)and 2pnp3Pe(2 ≤n ≤5)states of helium in comparison with reference data. The numbers in parentheses of the extrapolated values are the computational uncertainties. Here all the data are in units of a.u.

    Table 3 displays a comparison of energy levels for 2pnd1,3Do(3≤n ≤5) states. In this table, reference data d come from results of Bhattacharyya calculated with an extended Hylleraas basis.[26]For these 2pnd1,3Do(3≤n ≤5)states, our results are more consistent with reference data b,the most precise known results of these energy levels. Our results have at least 2 significant digits more accurate than reference data a and d for all 2pnd1,3Do(3≤n ≤5)states. These results indicate that for higher doubly excited bound states,precise energy levels could be acquired using the H-B-spline basis without too large increase of total number ofB-splineN. As we can see,the energy levels for higher excited states,either for1,3Peor1,3Dostates,have more convergency significant digits than lower excited states,mainly due to the knots ofB-spline functions we choose to make the H-B-spline basis more appropriate to fit wavefunctions of higher excited states,which distribute in a broader radial range, and the interelectronic correlated effect is weak. The results also provide the precise wavefunctions for the following calculations.

    Table 3. Extrapolated energy levels of doubly excited bound 2pnd1,3De(3 ≤n ≤5)states of helium in comparison with reference data. The numbers in parentheses of the extrapolated values are the computational uncertainties. Here all the data are in units of a.u.

    3.2. Geometric quantities

    The H-B-spline basis has shown its well capacity in calculation on energy levels for lower lying doubly excited bound states of helium. Here we use this basis to calculate the expectation values of geometric quantities〈r〉,〈r12〉,〈r<〉,〈r>〉,〈cosθ12〉and〈θ12〉in detail.As mentioned in Section 2,the investigation on〈θ12〉is carried out by multipole expansion. Table 4 presents the contributions of the first 17 order expansion terms to the expectation value〈θ12〉for 2p23Pestate under total number ofB-splineN=50 and partial-wave expansion lengthlmax=4. As displayed in this table, the contribution of〈Pk(cosθ12)〉reaches the magnitude of 10-9atk=17,and the changes of values of〈θ12〉are quite small. We truncate the summation(11)tokmax=17 in our calculations and extrapolate these values to give the computational uncertainties.

    Table 4. Contributions of the first 17 order expansion terms to the interelectronic angle expectation value 〈θ12〉 for doubly excited bound 2p23Pe state of helium. Here all the data are in units of a.u.

    Table 5. Expectation values of radial geometric quantities for doubly excited bound 2pnp1Pe(3 ≤n ≤5),2pnp3Pe(2 ≤n ≤5) and 2pnd1,3Do(3 ≤n ≤5) states of helium. The numbers in parentheses of the extrapolated values are the computational uncertainties. Here all the data are in units of a.u.

    Table 6. Expectation values of angular geometric quantities for doubly excited bound 2pnp1Pe(3 ≤n ≤5),2pnp3Pe(2 ≤n ≤5) and 2pnd1,3Do(3 ≤n ≤5) states of helium. The numbers in parentheses of the extrapolated values are the computational uncertainties. Here all the data are in units of a.u.

    4. Summary

    In this article, the Hylleraas-B-spline basis is imported into the calculation of energy levels for doubly excited 2pnp1Pe(3≤n ≤5), 2pnp3Pe(2≤n ≤5) and 2pnd1,3Do(3≤n ≤5) states of helium. Good agreement is achieved between our results and the precise values obtained by Kar and Ho[25]and Hilgeret al.[4]Geometric quantities〈r<〉,〈r>〉,〈r〉,〈r12〉,〈cosθ12〉and〈θ12〉of these states are investigated in detail as well and precise results are reported.Our results of these geometric quantities provide a precise reference for future studies.These calculations have shown the good capacity of the H-B-spline basis in calculation on lower lying doubly excited bound states. It would be appealing to an extend H-B-spline basis to the calculations of doubly excited resonance states of helium accompanied with stabilization and complex-rotation method.

    Acknowledgements

    Project supported by the National Natural Science Foundation of China (Grant No. 12074295). The authors thank Yongbo Tang for the meaningful discussion. The numerical calculations in this article were performed on the supercomputing system in the Supercomputing Center of Wuhan University.

    猜你喜歡
    三江
    三江之水天上來
    軍事文摘(2023年20期)2023-10-31 08:42:48
    三江之水天上來
    宜賓市三江新區(qū)
    廉政瞭望(2022年18期)2022-10-20 11:31:22
    它們的家鄉(xiāng)——“三江源”
    秘境
    桃花語
    三江源國家公園
    青海政報(2018年3期)2018-07-09 05:51:48
    三江源國家公園
    青海政報(2018年2期)2018-07-09 05:51:22
    三江并流
    民族音樂(2018年1期)2018-04-18 03:24:28
    av不卡在线播放| 老司机亚洲免费影院| 成人精品一区二区免费| 啦啦啦视频在线资源免费观看| 国产精品综合久久久久久久免费 | 亚洲精品粉嫩美女一区| 99re6热这里在线精品视频| 日韩欧美一区视频在线观看| 久久国产乱子伦精品免费另类| videos熟女内射| 99re在线观看精品视频| 久久国产精品男人的天堂亚洲| 天天躁狠狠躁夜夜躁狠狠躁| 欧美精品高潮呻吟av久久| 国产不卡一卡二| 人妻 亚洲 视频| a级片在线免费高清观看视频| 女人久久www免费人成看片| 日韩大码丰满熟妇| 两个人看的免费小视频| 久久婷婷成人综合色麻豆| 国产欧美日韩一区二区三| 亚洲精品中文字幕一二三四区| 在线av久久热| 免费日韩欧美在线观看| av在线播放免费不卡| 少妇裸体淫交视频免费看高清 | 欧美黄色淫秽网站| 91九色精品人成在线观看| 999久久久国产精品视频| 天堂√8在线中文| 久久九九热精品免费| 在线播放国产精品三级| 黄网站色视频无遮挡免费观看| 另类亚洲欧美激情| 嫁个100分男人电影在线观看| 色尼玛亚洲综合影院| 色老头精品视频在线观看| 国产精品久久久av美女十八| 久久人妻福利社区极品人妻图片| 成年女人毛片免费观看观看9 | av有码第一页| aaaaa片日本免费| 黄色毛片三级朝国网站| 人人妻,人人澡人人爽秒播| 国产亚洲欧美在线一区二区| 老司机午夜十八禁免费视频| 欧美 亚洲 国产 日韩一| 国产日韩欧美亚洲二区| 午夜亚洲福利在线播放| 高清av免费在线| 欧美性长视频在线观看| 80岁老熟妇乱子伦牲交| 欧美成狂野欧美在线观看| 9色porny在线观看| 日本黄色视频三级网站网址 | 在线观看舔阴道视频| av线在线观看网站| 一夜夜www| 久久精品国产99精品国产亚洲性色 | 一本一本久久a久久精品综合妖精| 国产黄色免费在线视频| 精品国产乱子伦一区二区三区| 久久婷婷成人综合色麻豆| 一二三四社区在线视频社区8| 久久九九热精品免费| 怎么达到女性高潮| 99久久人妻综合| 国产免费现黄频在线看| 国产成人欧美在线观看 | 久久久久国内视频| 人妻丰满熟妇av一区二区三区 | 久久久久国内视频| 窝窝影院91人妻| 老熟妇仑乱视频hdxx| 亚洲精品粉嫩美女一区| 亚洲精品乱久久久久久| 欧美精品啪啪一区二区三区| 18禁国产床啪视频网站| 欧美日韩福利视频一区二区| 香蕉久久夜色| 欧美黑人精品巨大| 香蕉国产在线看| 国产99久久九九免费精品| 成人av一区二区三区在线看| 中文字幕人妻丝袜制服| 亚洲精品国产色婷婷电影| 女同久久另类99精品国产91| 国产三级黄色录像| 少妇的丰满在线观看| 久久精品亚洲熟妇少妇任你| 在线免费观看的www视频| 男人的好看免费观看在线视频 | 国产高清视频在线播放一区| 极品教师在线免费播放| 校园春色视频在线观看| 亚洲精品在线美女| 女人久久www免费人成看片| 日韩一卡2卡3卡4卡2021年| 欧美乱色亚洲激情| 他把我摸到了高潮在线观看| 亚洲人成电影免费在线| 好看av亚洲va欧美ⅴa在| tube8黄色片| 交换朋友夫妻互换小说| 伦理电影免费视频| 亚洲专区中文字幕在线| 亚洲欧美一区二区三区黑人| 91大片在线观看| 国产无遮挡羞羞视频在线观看| 老汉色av国产亚洲站长工具| 少妇的丰满在线观看| 午夜激情av网站| 免费在线观看完整版高清| 欧美日韩视频精品一区| 一本综合久久免费| 欧美午夜高清在线| 亚洲欧美激情综合另类| 国产精品99久久99久久久不卡| 热99久久久久精品小说推荐| bbb黄色大片| 91九色精品人成在线观看| 精品国产一区二区三区四区第35| 又大又爽又粗| 热re99久久国产66热| 亚洲欧美色中文字幕在线| 精品人妻熟女毛片av久久网站| 宅男免费午夜| 国产精品.久久久| 亚洲性夜色夜夜综合| 中亚洲国语对白在线视频| 免费在线观看黄色视频的| 成人18禁在线播放| 色播在线永久视频| 国产亚洲精品久久久久久毛片 | 中出人妻视频一区二区| 中文字幕av电影在线播放| 一边摸一边做爽爽视频免费| av欧美777| 国产亚洲精品久久久久5区| 精品国产一区二区久久| 亚洲国产欧美网| 一级a爱片免费观看的视频| 视频在线观看一区二区三区| 成人精品一区二区免费| 精品一区二区三卡| 青草久久国产| 欧美乱色亚洲激情| 亚洲熟妇中文字幕五十中出 | 久久精品国产综合久久久| 国产成人系列免费观看| 午夜精品在线福利| 国产精品乱码一区二三区的特点 | 日本欧美视频一区| 18在线观看网站| 亚洲 欧美一区二区三区| 精品人妻1区二区| 亚洲av熟女| 国内久久婷婷六月综合欲色啪| 超碰97精品在线观看| 黄色视频,在线免费观看| 欧美中文综合在线视频| 自线自在国产av| 日本a在线网址| 国产日韩一区二区三区精品不卡| 午夜福利视频在线观看免费| 午夜精品在线福利| 91大片在线观看| www日本在线高清视频| 亚洲 国产 在线| 两个人免费观看高清视频| 丝袜美腿诱惑在线| 久久久精品国产亚洲av高清涩受| 欧美日韩国产mv在线观看视频| 色在线成人网| 国产免费现黄频在线看| 69精品国产乱码久久久| 91老司机精品| 在线观看66精品国产| 18禁观看日本| 亚洲第一av免费看| 亚洲九九香蕉| 两人在一起打扑克的视频| 热re99久久国产66热| 嫩草影视91久久| 国产精品九九99| 欧美人与性动交α欧美精品济南到| 成人18禁高潮啪啪吃奶动态图| 亚洲精品一卡2卡三卡4卡5卡| av欧美777| 精品福利永久在线观看| 亚洲综合色网址| www日本在线高清视频| 成年动漫av网址| 久久久久久久久久久久大奶| 午夜久久久在线观看| 国产精品99久久99久久久不卡| 99在线人妻在线中文字幕 | 欧美黑人精品巨大| 欧美黄色淫秽网站| 天天躁夜夜躁狠狠躁躁| 国产成人影院久久av| 色播在线永久视频| 精品人妻熟女毛片av久久网站| 国产单亲对白刺激| 精品电影一区二区在线| 国产精品偷伦视频观看了| 午夜91福利影院| 久久天堂一区二区三区四区| av片东京热男人的天堂| 久久婷婷成人综合色麻豆| 狠狠狠狠99中文字幕| 我的亚洲天堂| 欧美午夜高清在线| 亚洲综合色网址| 国产精品综合久久久久久久免费 | 他把我摸到了高潮在线观看| 日本撒尿小便嘘嘘汇集6| 麻豆成人av在线观看| 亚洲av电影在线进入| 国产精品永久免费网站| 日本欧美视频一区| 免费不卡黄色视频| 亚洲国产欧美日韩在线播放| 国产成人影院久久av| 欧美乱色亚洲激情| 露出奶头的视频| 伦理电影免费视频| 日韩精品免费视频一区二区三区| av片东京热男人的天堂| 亚洲全国av大片| 亚洲国产欧美一区二区综合| 91精品国产国语对白视频| 日韩欧美一区二区三区在线观看 | 国产精品综合久久久久久久免费 | 18禁国产床啪视频网站| 免费久久久久久久精品成人欧美视频| 十八禁高潮呻吟视频| 成人手机av| 高清欧美精品videossex| 人人妻人人爽人人添夜夜欢视频| 亚洲国产中文字幕在线视频| 天天躁狠狠躁夜夜躁狠狠躁| 性少妇av在线| 一进一出抽搐gif免费好疼 | 淫妇啪啪啪对白视频| 免费少妇av软件| 日本一区二区免费在线视频| 亚洲精品国产区一区二| 日韩大码丰满熟妇| 国产精品1区2区在线观看. | av电影中文网址| 亚洲av美国av| 丰满人妻熟妇乱又伦精品不卡| 亚洲少妇的诱惑av| 99热国产这里只有精品6| 在线观看免费视频日本深夜| 日本a在线网址| 真人做人爱边吃奶动态| 欧美日本中文国产一区发布| 精品久久久久久久久久免费视频 | 十八禁网站免费在线| 国产精品久久电影中文字幕 | 中文字幕人妻熟女乱码| 日本精品一区二区三区蜜桃| 国产精品 欧美亚洲| 午夜影院日韩av| 别揉我奶头~嗯~啊~动态视频| 国产乱人伦免费视频| 老司机影院毛片| 国产精品一区二区免费欧美| av在线播放免费不卡| 日本撒尿小便嘘嘘汇集6| 老汉色∧v一级毛片| 久久精品91无色码中文字幕| 国产精品国产高清国产av | 亚洲精品一卡2卡三卡4卡5卡| 丝袜美腿诱惑在线| 在线观看舔阴道视频| 在线天堂中文资源库| 亚洲欧洲精品一区二区精品久久久| 亚洲成人免费av在线播放| 国产欧美日韩综合在线一区二区| 变态另类成人亚洲欧美熟女 | videosex国产| 久久国产亚洲av麻豆专区| 免费在线观看完整版高清| 免费久久久久久久精品成人欧美视频| 欧美在线黄色| 少妇的丰满在线观看| 日韩欧美国产一区二区入口| 视频区图区小说| 激情视频va一区二区三区| 69av精品久久久久久| 男男h啪啪无遮挡| 黄片小视频在线播放| 久久久国产一区二区| 男人舔女人的私密视频| 女警被强在线播放| 久久久久久人人人人人| 欧美日韩视频精品一区| 国产精品久久久久久精品古装| 免费看十八禁软件| 在线观看免费视频日本深夜| 18在线观看网站| 国产精品国产高清国产av | 亚洲熟女毛片儿| av网站免费在线观看视频| 久久精品亚洲精品国产色婷小说| 国产精品自产拍在线观看55亚洲 | 51午夜福利影视在线观看| 美女福利国产在线| 亚洲av日韩精品久久久久久密| 精品少妇久久久久久888优播| 国产一卡二卡三卡精品| 国产高清videossex| 国产xxxxx性猛交| 操美女的视频在线观看| 国产深夜福利视频在线观看| 99香蕉大伊视频| 国产99白浆流出| 最新的欧美精品一区二区| 精品福利观看| 欧美精品人与动牲交sv欧美| 亚洲欧美精品综合一区二区三区| 久久久久久久久久久久大奶| 国产精品1区2区在线观看. | 又黄又爽又免费观看的视频| 亚洲av熟女| 欧美 亚洲 国产 日韩一| 99国产综合亚洲精品| 成人精品一区二区免费| 91成年电影在线观看| 免费一级毛片在线播放高清视频 | 欧美老熟妇乱子伦牲交| 亚洲精品国产色婷婷电影| 欧美黑人精品巨大| 国产片内射在线| 精品人妻在线不人妻| 国产男女内射视频| 亚洲片人在线观看| 日韩欧美在线二视频 | 夜夜躁狠狠躁天天躁| 80岁老熟妇乱子伦牲交| 搡老乐熟女国产| 国产欧美日韩一区二区三| 国产精品 欧美亚洲| 亚洲片人在线观看| 久久久久精品国产欧美久久久| 国产高清激情床上av| 美女扒开内裤让男人捅视频| 80岁老熟妇乱子伦牲交| 欧美大码av| 国产免费av片在线观看野外av| www.精华液| 精品视频人人做人人爽| 在线播放国产精品三级| 99热只有精品国产| 看免费av毛片| videosex国产| 国产亚洲精品一区二区www | 国产一区二区三区视频了| 中文欧美无线码| 国产99白浆流出| 如日韩欧美国产精品一区二区三区| 亚洲三区欧美一区| 男人的好看免费观看在线视频 | 亚洲久久久国产精品| 黄色丝袜av网址大全| 精品人妻在线不人妻| svipshipincom国产片| 国产主播在线观看一区二区| 在线播放国产精品三级| 美女高潮喷水抽搐中文字幕| 亚洲 欧美一区二区三区| 黄色视频不卡| 亚洲成人手机| 国产伦人伦偷精品视频| 久久久久国产精品人妻aⅴ院 | 999精品在线视频| 国产熟女午夜一区二区三区| 大型黄色视频在线免费观看| 亚洲人成伊人成综合网2020| 国产精品久久久av美女十八| 国产成人啪精品午夜网站| 国产高清激情床上av| 国产精品永久免费网站| 亚洲精品一二三| av天堂久久9| 亚洲男人天堂网一区| 两个人看的免费小视频| 久久香蕉国产精品| 搡老熟女国产l中国老女人| 中文字幕另类日韩欧美亚洲嫩草| 又黄又爽又免费观看的视频| 久久久久国内视频| 飞空精品影院首页| bbb黄色大片| 十八禁高潮呻吟视频| 女人被狂操c到高潮| 国产xxxxx性猛交| 欧美中文综合在线视频| 亚洲第一青青草原| 啦啦啦在线免费观看视频4| av有码第一页| 国产免费男女视频| 啪啪无遮挡十八禁网站| 中文亚洲av片在线观看爽 | 无遮挡黄片免费观看| 欧美一级毛片孕妇| 国产欧美日韩一区二区三| 久久人人爽av亚洲精品天堂| 国产亚洲欧美在线一区二区| 又黄又粗又硬又大视频| 交换朋友夫妻互换小说| 激情视频va一区二区三区| 国产欧美日韩一区二区精品| 午夜免费成人在线视频| 欧美日韩亚洲国产一区二区在线观看 | 精品国产乱码久久久久久男人| 在线十欧美十亚洲十日本专区| 男女免费视频国产| 午夜91福利影院| 日韩 欧美 亚洲 中文字幕| 又黄又粗又硬又大视频| 老汉色av国产亚洲站长工具| 亚洲综合色网址| 久久国产乱子伦精品免费另类| 三级毛片av免费| 国产一区二区三区视频了| a级毛片在线看网站| 亚洲自偷自拍图片 自拍| 国产一区二区三区在线臀色熟女 | 国产精品久久电影中文字幕 | 免费人成视频x8x8入口观看| 国产在视频线精品| 亚洲视频免费观看视频| 自拍欧美九色日韩亚洲蝌蚪91| 变态另类成人亚洲欧美熟女 | 999久久久精品免费观看国产| 国产黄色免费在线视频| 精品福利观看| 午夜亚洲福利在线播放| 欧美乱色亚洲激情| 欧美日韩乱码在线| 欧美人与性动交α欧美软件| 欧美日本中文国产一区发布| 亚洲 欧美一区二区三区| 99热只有精品国产| 人人澡人人妻人| www.999成人在线观看| 免费在线观看日本一区| 国产午夜精品久久久久久| 国产在线精品亚洲第一网站| 亚洲第一青青草原| xxxhd国产人妻xxx| 男女床上黄色一级片免费看| www.熟女人妻精品国产| 91麻豆精品激情在线观看国产 | 亚洲情色 制服丝袜| 国产欧美日韩一区二区三| 国产精品欧美亚洲77777| 亚洲第一av免费看| 国产精品九九99| 在线国产一区二区在线| 国产三级黄色录像| 日日爽夜夜爽网站| 女性生殖器流出的白浆| 亚洲av片天天在线观看| 国产免费现黄频在线看| 真人做人爱边吃奶动态| 国产午夜精品久久久久久| 99国产精品99久久久久| 大陆偷拍与自拍| 一本综合久久免费| 亚洲九九香蕉| 国产在视频线精品| 最近最新中文字幕大全免费视频| 成年版毛片免费区| 久久精品成人免费网站| 日韩中文字幕欧美一区二区| 成人黄色视频免费在线看| 亚洲全国av大片| 国产精品秋霞免费鲁丝片| 久久久久久人人人人人| 久久午夜亚洲精品久久| 超碰97精品在线观看| 丝袜人妻中文字幕| 97人妻天天添夜夜摸| 性色av乱码一区二区三区2| 在线观看舔阴道视频| 国产免费现黄频在线看| 一级毛片女人18水好多| 新久久久久国产一级毛片| 国产成人一区二区三区免费视频网站| 婷婷成人精品国产| 老鸭窝网址在线观看| 好看av亚洲va欧美ⅴa在| 露出奶头的视频| 成人精品一区二区免费| 国产不卡一卡二| 国产亚洲欧美精品永久| 搡老岳熟女国产| 国产麻豆69| 999久久久国产精品视频| 99精品久久久久人妻精品| 精品久久久精品久久久| 99精国产麻豆久久婷婷| 两性午夜刺激爽爽歪歪视频在线观看 | 国产精品偷伦视频观看了| 十八禁高潮呻吟视频| 久久久久精品国产欧美久久久| 视频区欧美日本亚洲| 国产精品99久久99久久久不卡| 在线观看免费午夜福利视频| 一区福利在线观看| 看片在线看免费视频| 亚洲黑人精品在线| 男人舔女人的私密视频| 国产精品 欧美亚洲| 女性生殖器流出的白浆| 亚洲精品一卡2卡三卡4卡5卡| 操出白浆在线播放| 久久精品熟女亚洲av麻豆精品| 亚洲欧美日韩高清在线视频| 中文字幕人妻丝袜制服| 身体一侧抽搐| av网站在线播放免费| 成年人免费黄色播放视频| 久久久久国产精品人妻aⅴ院 | 丁香欧美五月| 免费观看精品视频网站| 欧美在线一区亚洲| 天天躁夜夜躁狠狠躁躁| 成人18禁在线播放| 黑丝袜美女国产一区| 国产亚洲精品久久久久久毛片 | 精品国产美女av久久久久小说| 免费在线观看日本一区| 人成视频在线观看免费观看| 亚洲全国av大片| svipshipincom国产片| 国产成人精品在线电影| 国产亚洲精品久久久久久毛片 | 国产91精品成人一区二区三区| 色综合婷婷激情| 18在线观看网站| 村上凉子中文字幕在线| 久久热在线av| 性色av乱码一区二区三区2| 欧美亚洲日本最大视频资源| 成熟少妇高潮喷水视频| 五月开心婷婷网| av免费在线观看网站| 亚洲人成伊人成综合网2020| a级片在线免费高清观看视频| 日韩免费高清中文字幕av| 久久九九热精品免费| 国产一区在线观看成人免费| 久久国产亚洲av麻豆专区| 中国美女看黄片| 国产精品影院久久| 欧美久久黑人一区二区| 狠狠狠狠99中文字幕| 午夜精品国产一区二区电影| 免费久久久久久久精品成人欧美视频| 成人亚洲精品一区在线观看| 亚洲熟女毛片儿| 精品欧美一区二区三区在线| 老汉色av国产亚洲站长工具| 9热在线视频观看99| 日本wwww免费看| 亚洲第一青青草原| 在线十欧美十亚洲十日本专区| 日韩有码中文字幕| 丰满的人妻完整版| 中文字幕精品免费在线观看视频| 欧美人与性动交α欧美精品济南到| 亚洲精品久久成人aⅴ小说| 99久久99久久久精品蜜桃| 久久性视频一级片| 国产又色又爽无遮挡免费看| 色播在线永久视频| 欧美精品一区二区免费开放| 久久狼人影院| 亚洲中文日韩欧美视频| 久久精品亚洲av国产电影网| 午夜福利欧美成人| 亚洲av成人一区二区三| 桃红色精品国产亚洲av| 99re在线观看精品视频| 在线国产一区二区在线| 两性夫妻黄色片| 精品一品国产午夜福利视频| 咕卡用的链子| 如日韩欧美国产精品一区二区三区| 久久精品熟女亚洲av麻豆精品| netflix在线观看网站| 久久精品亚洲av国产电影网| 精品视频人人做人人爽| 亚洲欧美一区二区三区久久| 国产欧美日韩一区二区精品| 国产蜜桃级精品一区二区三区 | 国产精品偷伦视频观看了| 精品国产一区二区三区四区第35| 色播在线永久视频| 国产av又大| 黄色女人牲交| 亚洲自偷自拍图片 自拍| 国产精品美女特级片免费视频播放器 | 成人特级黄色片久久久久久久| 成熟少妇高潮喷水视频| 黑丝袜美女国产一区| 12—13女人毛片做爰片一| 国产精品永久免费网站|