下列具Cis构型的化合物是（）。

A . 正确 B . 错误

A . 2S，3S； B . 2R，3R； C . 2S，3R； D . 2R，3S。

A . A B . B C . C D . D

A . 正确 B . 错误

A . 红外光谱 B . Mosher法 C . X-ray衍射 D . 旋光谱

A . A、视觉识别系统 B . B、行为识别系统 C . C、理念识别系统 D . D、精神识别

A . 2S，3S； B . 2R，3R； C . 2S，3R； D . 2R，3S。

A . A B . B C . C D . D

<img src='https://img2.soutiyun.com/ask/2020-11-20/974714776394622.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/51132001-51135000/51134603/971370051188662.png' />

<img src='https://img2.soutiyun.com/ask/2020-07-23/964343656911442.png' />

指出下列结构式所代表的是哪有类化合物(例如：双糖、吡喃戊醛.....)，指出它们的构型(D或L)及糖苷键类型。 <img src='https://img2.soutiyun.com/ask/2021-01-22/980177313851944.png' /> <img src='https://img2.soutiyun.com/ask/2021-01-22/980177325466608.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/17841001-17844000/17841552/2016032014323332367.jpg' /> A．A B． B C． C D． D

(1)<img src='https://img2.soutiyun.com/ask/2020-10-20/972053624653891.png' />(2)<img src='https://img2.soutiyun.com/ask/2020-10-20/972053635151492.png' /> (3)<img src='https://img2.soutiyun.com/ask/2020-10-20/972053684937339.png' />(4)<img src='https://img2.soutiyun.com/ask/2020-10-20/972053674654751.png' />(5)<img src='https://img2.soutiyun.com/ask/2020-10-20/972053694889908.png' />

是 否

<img src='https://img2.soutiyun.com/ask/2020-08-26/967309410052268.png' /> <img src='https://img2.soutiyun.com/ask/2020-08-26/967309421855943.png' />

<img src='https://img2.soutiyun.com/ask/2021-02-20/982666750273954.jpg' /> <img src='https://img2.soutiyun.com/ask/2021-02-20/982666758571429.jpg' />

A．VIS系统 B．VI系统 C．MIS系统 D．IS系统

<img src='https://img2.soutiyun.com/ask/2021-01-21/980085530975438.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-16/971693774665162.png' />