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【简答题】
3 举例并简要说明: a. 产生对映异构体的必要条件是什么? b. 分子具有旋光性的必要条件是什么? c. 含有手性碳原子的分子是否都有旋光活性?是否有对映异构体? d. 没有手性碳原子的化合物是否可能有对映体?
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【简答题】Jane was attracted by the behavior of animals. She could sit for hours _________ (observe) a bird a net or an ant _________ (carry) a leaf.
【简答题】Word2010打印已经编辑好的文档之前,要看到整篇文档的排版效果,应该使用的功能是[[ ]]。
【单选题】She was so attracted by the story that she ___________ it for three hours before she realized it.
A.
had read
B.
read
C.
was reading
D.
will have read
【判断题】After Alice took up the fan and a pair of the gloves, and was just going to leave the room, she was attracted by a little bottle that labelled "DRINK ME" near the looking-glass.
A.
正确
B.
错误
【简答题】One day, while s___ some magazines, a true story caught her eyes/she was attracted by a true story.
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