皮皮学，免费搜题
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【单选题】
该工程采用的是什么打桩机械A.
柴油打桩机
B.
静力压桩机
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】The bookstore has prepared ______ textbooks for all the new students in this school.
A.
plenty a
B.
enough
C.
enough of
D.
as many
【简答题】Viele Menschen fürchten vor der Dunkelheit.
【简答题】________ Flughafen kann man viele Menschen sehen.
【单选题】听力原文：W: The bookstore has run out of the textbook assigned by Dr. Martin. M: He didn't expect so many students to take his class this semester. Q: What do we learn about this situation? (18)
A.
Dr. Martin didn't want so many students in his class.
B.
The students were supposed to buy the textbook earlier.
C.
The bookstore is going out of business.
D.
Dr. Martin didn't order enough textbooks for his students.
【简答题】Viele Menschen __________ dann sehr viel.
【简答题】Viele Menschen bekommen bei Stress ___________.
【简答题】已知函数f （x）= 的定义域集合是A，函数g（x）=lg[x 2 ﹣（2a+1）x+a 2 +a]的定义域集合是B． （1）求集合A，B． （2）若A∪B=B，求实数a的取值范围．
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