皮皮学，免费搜题
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【单选题】
按照工作原理分类,离心泵属于( )。A.
往复泵
B.
叶轮式泵
C.
叶片式泵
D.
容积泵
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Bruce, ______ headmaster of our school, was elected by voting and other leaders were chosen in ______ same way.
A.
/; the
B.
the; the
C.
/; a
D.
a; the
【简答题】A．She didn't know how to set an alarm clock. B．She had difficulty getting up early. C．She often missed her classes. D．She did not like her brother-in-law.
【单选题】______and business leaders were delighted at the decision to hold the national motor fair in the city.
A.
Civil
B.
Civilized
C.
Civilian
D.
Civic
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