下列分子的<img src='https://img2.soutiyun.com/latex/latex.action' />值不等于零的是( )。

已知下列反应的平衡常数：<img src='https://img2.soutiyun.com/ask/2019-12-18/945528385312623.png' />则同温下反<img src='https://img2.soutiyun.com/ask/2019-12-18/945528393394473.png' />的平衡常数为( )。

求下列逻辑函数的反函数：<img src='https://img2.soutiyun.com/ask/2020-02-20/951087694661952.png' />

下列各图常用来说明甲烷的分子结构，哪一种与其真实存在状况相差较大？（）<img src='https://img2.soutiyun.com/shangxueba/ask/18891001-18894000/18892552/2016071515501999968.jpg' />

求下列等式：设<img src='https://img2.soutiyun.com/ask/2020-11-11/973957900743664.png' />

女，31岁，右侧腰部胀痛不适，MRI检查如图所示，下列说法正确的是（）<img src='https://img2.soutiyun.com/shangxueba/ask/18255001-18258000/18255014/2015111115433880997.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18255001-18258000/18255014/2015111115434082809.jpg' />

判定下列定积分的大小：<img src='https://img2.soutiyun.com/ask/2020-08-14/966243888898776.png' />

已知函数<img src='https://img2.soutiyun.com/latex/latex.action' />则下列结论中( )正确．

298K，下列反应的<img src='https://img2.soutiyun.com/latex/latex.action' />等于AgCl(s)的<img src='https://img2.soutiyun.com/latex/latex.action' />的为( )。

若<img src='https://img2.soutiyun.com/latex/latex.action' />，<img src='https://img2.soutiyun.com/latex/latex.action' />，则下列式子成立的是( )

下列强心苷的结构应属于<img src='https://img2.soutiyun.com/ask/2020-03-09/952635461408425.png' />

15．选用适当的坐标计算下列各题：<img src='https://img2.soutiyun.com/ask/2020-02-24/951410575923193.png' /><img src='https://img2.soutiyun.com/ask/2020-02-24/951410583637991.png' />

膜渗透压法测定聚合物相对分子质量，以<img src='https://img2.soutiyun.com/ask/2019-12-19/945621318870222.png' />对c作图，得到的直线的截距随温度的升高而( )。

在<img src='https://img2.soutiyun.com/ask/2020-07-28/964798262295166.png' />反应中，下列说法正确的是（）

下列单色用地图例中，不符合城乡规划之制图要求的是（）<img src='https://img2.soutiyun.com/shangxueba/ask/17931001-17934000/17933684/2015091616204385483.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17931001-17934000/17933684/2015091616210064320.jpg' />

如图，下列叙述正确的是（）。<img src='https://img2.soutiyun.com/shangxueba/ask/17499001-17502000/17500915/201602281442146984.jpg' />

在下列各种化合物中，分子间有氢键的是（）。<img src='https://img2.soutiyun.com/ask/uploadfile/4104001-4107000/e6cbf413be90f33967556d6ce6def66f.jpg' />

下列哪项不是前牙的解剖结构（）<img src='https://img2.soutiyun.com/shangxueba/ask/17646001-17649000/17646134/2015111310243036193.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17646001-17649000/17646134/2015111310244368565.jpg' />

设图示的两条曲线分别表示在相同温度下氧气和氢气分子的速率分布曲线；令<img src='https://img2.soutiyun.com/shangxueba/ask/21060001-21063000/21061703/661a3aa-chaoxing2016-508765.png' />和<img src='https://img2.soutiyun.com/shangxueba/ask/21060001-21063000/21061703/4b52ff9-chaoxing2016-508766.png' />分别表示氧气和氢气的最概然速率，则<img src='https://img2.soutiyun.com/shangxueba/ask/21060001-21063000/21061703/85642dd-chaoxing2016-508767.png' />

下列化合物不能与<img src='https://img2.soutiyun.com/shangxueba/ask/17844001-17847000/17845710/2016032015180822263.jpg' />发生反应的是（）。<img src='https://img2.soutiyun.com/shangxueba/ask/17844001-17847000/17845710/2016032015181816392.jpg' />

闪耀光栅的特点之一是要使入射角<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17929895/2016031410000852452.jpg' />、衍射角<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17929895/2016031410001441222.jpg' />和闪耀角<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17929895/2016031410001975410.jpg' />之间满足下列条件（）。

下列反应中<img src='https://img2.soutiyun.com/shangxueba/ask/18597001-18600000/18598524/2016071715334794772.jpg' />>0的是：（）<img src='https://img2.soutiyun.com/shangxueba/ask/18597001-18600000/18598524/201607171533455097.jpg' />

下列规划图例要素中，图例和注释名称对应不正确的是（）<img src='https://img2.soutiyun.com/shangxueba/ask/17934001-17937000/17935057/2015091616421074820.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17934001-17937000/17935057/2015091616422640392.jpg' />

分子质量为m的气体在温度T下处于平衡，若以vx、vy、vz，及v分别表示分子速度的x、y、z三个分量及其速率，试求下述平均值：(1)<img src='https://img2.soutiyun.com/ask/2020-07-02/962547610404387.png' /><img src='https://img2.soutiyun.com/ask/2020-07-02/962547621119.png' />

<table><tbody><tr><td>下列化学用语的书写正确的是（）<table><tr><td>A．硫原子的结构示意图：<img src='https://img2.soutiyun.com/ask/uploadfile/8814001-8817000/e07df22124343bb7081aa0abfefeb364.png' /></td></tr><tr><td>B．苯的结构简式：<img src='https://img2.soutiyun.com/ask/uploadfile/8814001-8817000/96be95a61bb52e3a90780a462f1051b3.png' /></td></tr><tr><td>C．溴化钠的电子式：<img src='https://img2.soutiyun.com/ask/uploadfile/8814001-8817000/fd7a46da95fe003a50ff6cbd7b0b145f.png' /></td></tr><tr><td>D．用电子式<img src='https://img2.soutiyun.com/ask/uploadfile/8814001-8817000/fb200ea945fa428971c5597980323ae2.png' />表示氯化氢分子的形成过程</td></tr></table></td></tr></tbody></table>