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【多选题】
无产阶级及其政党在经济文化相对落后的国家取得政权,建立起了崭新的社会主义制度,为开展大规模的社会主义建设开辟了广阔前景。但是,由于受到生产力发展状况、经济基础和上层建筑发展状况的制约,受到国际环境的严峻挑战等,这些国家建设社会主义必然具有艰巨性和长期性。其原因主要是()A.
生产力发展状况的制约
B.
经济基础和上层建筑发展状况的制约
C.
国际环境的严峻挑战
D.
马克思主义政党对社会主义的认识需要长期的艰苦的过程
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【简答题】PN 结形成后,在其内部就形成了一个内 [ ] ,其方向是由 [ ] 区指向 [ ] 区。
【单选题】Which of the following statements is true of libraries in the UK?
A.
The library is sacrificing books in favor of internet access and other facilities.
B.
More and more people go to the library reading a book.
C.
There are more and more computers in the library to facilitate the book index for the readers.
D.
The number of the booking in the library has increased.
【单选题】Mary does not read newspapers she reads Shakespeare, ______.
A.
therefore
B.
eventually
C.
however
D.
although
【单选题】What will happen to patrons if their library materials become overdue while the library is closed and they do not renew or return them?
A.
They will have to pay a fine.
B.
They will be required to use branch libraries.
C.
They will not be charged at all.
D.
They will lose their library privileges.
【简答题】空调系统中的发动机转速检测电路的转速信号来自（ ）。
【单选题】— How many people are there in the library? — _______. The library is not open today. [ ]
A.
Someone
B.
None
C.
Nothing
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