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【单选题】
调适量石膏倒入下半盒中,不要倒满,达_______即可A.
1/3
B.
1/2
C.
2/3
D.
3/4
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反馈参考答案：
举一反三
【简答题】世界上实行养老保险制度的国家可以分为三种类型:()、()、()。
【单选题】—_____ your brother speak Japanese? —Yes, he has learnt it in Tokyo for three years. [ ]
A.
Should
B.
Must
C.
Can
D.
May
【单选题】He will stay in Tokyo for ___________ days.
A.
a pair of
B.
a kind of
C.
a couple of
D.
a piece of
【单选题】He ______ Tokyo for two weeks.
A.
has left
B.
has been away from
C.
has been left
D.
left
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