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搜题
【单选题】
下列化合物有几个手性碳原子？（ ）【图片】A.
4
B.
5
C.
3
D.
2
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举一反三
【单选题】Why would so many Chinese Americans in California be involved in the occupations of restaurants and laundries in the 19th century?
A.
Because they were good at these jobs.
B.
Because there were few women to do those jobs at that time.
C.
Because of the prejudice and discrimination against the Chinese, they had no other choices.
D.
Because they could not find gold in mines.