皮皮学，免费搜题
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【判断题】
国家突发公共事件总体预案，将突发公共事件分为自然灾害、事故灾害、公共卫生事件和社会安全事件四类，每一类突发公共事件应分别编制专项预案。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】There has not been a great response to the sale, ______?
A.
does there
B.
hasn't it
C.
hasn't there
D.
has there
【简答题】Who will be the w______ of the hasn’t been known.
【单选题】I’m sorry you can’t go in now. The room _______ yet.
A.
hasn’t been cleaned
B.
hasn’t cleaned
C.
isn’t been cleaned
D.
hasn’t being cleaned
【单选题】—Do you know the result of the competition? —No. It _____. [ ]
A.
hasn't announced
B.
hasn't been announced
C.
didn't announce
D.
wasn't announced
【单选题】After such a storm I’m surprised that the river __________.
A.
hasn’t flooded
B.
hasn’t been flooded
C.
wasn’t flooded
D.
hadn’t been flooded
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