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问题 选择题

某有机物的结构简式为， 该有机物不可能具有的性质是[ ]

A．能跟NaOH溶液反应

B．能使酸性KMnO4溶液褪色

C．能发生酯化反应

D．能发生水解反应

答案

答案：D

判断题

根据宪法，任何国家机关、社会团体和个人不得强制公民信仰或不信仰宗教，不得歧视信仰和不信仰宗教的公民。
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单项选择题

You are in charge of a stand-on vessel in a crossing situation.The other vessel is 1.5 miles to port.You believe that risk of collision exists.You should（）.

A.take avoiding action immediately upon determining that risk of collision exists

B.immediately sound the danger signal

C.take avoiding action only after providing the give-way vessel time to take action ,and determining that her action is not appropriate

D.hold course and speed until the point of extremis, and then sound the danger signal, taking whatever action will best avert collision
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