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问题 多项选择题

计算机联锁“上电解锁”按钮只有在（）时，出现全站（场）锁闭的情况下使用，其他任何时候均不可以使用。

A、自动切换

B、人工切换

C、进路解锁不了

D、开机

答案

参考答案：B, D

单项选择题

Since minors should not smoke, the proposed law prohibiting cigarette sales to minors is reasonable. However, the proposed ban on cigarette vending machines is like installing a roadblock to apprehend the one person in a hundred who drives without a license. A roadblock stops everyone, not just those who break the law.
The answer to which of the following questions would be most important in evaluating the objection above to a ban on cigarette vending machines

A．Do cigarette vending machines malfunction more frequently than do food vending machines

B．Are there current laws that prohibit the sale to minors of materials intended only for adults

C．Would an increase in taxes on cigarette sales help deter minors from purchasing cigarettes

D．Would a ban on cigarette vending machines inconvenience a significant number of cigarette-buying adults

E．(E) Are items more expensive when sold from a vending machine than when sold in retail stores
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单项选择题

格子细胞是由哪种细胞转变而来（）

A.星形胶质细胞

B.少突胶质细胞

C.室管膜细胞

D.小胶质细胞

E.神经细胞
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