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【单选题】
关于闭经的分类、错误的是A.
卵巢性闭经
B.
子宫性闭经
C.
垂体性闭经
D.
下丘脑性闭经
E.
输闭经
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【单选题】Tom has been preparing carefully for the English examination, so that he can be sure of passing it at his first __.
A.
request
B.
attempt
C.
promise
D.
purpose
【单选题】Tom's grandfather ____ for two years. [ ]
A.
died
B.
has been dead
C.
has been death
D.
had died
【单选题】Our physics teacher and English teacher always give their lessons in a lively and clear way,____ greatly benefits us students.
A.
from which
B.
in which
C.
that
D.
which
【简答题】我国宪法规定，中华人民共和国下列选项中的哪一主体有休息的权利?( ) A．劳动者 B．公民 C．职工 D．工人
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