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【单选题】
“一国两制”的前提是(    )
A.
坚持四项基本原则    
B.
坚t持和平共处原则
C.
坚持高度自治原则    
D.
坚持一个中国原则
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A.
(A)
B.
(B)
【单选题】生石膏的分子式是()
A.
CaSO4•2H2O
B.
CaSO4
C.
CaSO4•1/2H2O
D.
CaO
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A.
After
B.
In
C.
From
D.
Since
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A.
After
B.
In
C.
From
D.
Since
【单选题】建筑石膏的分子式是 ( )
A.
CaSO 4 ·1/2H 2 O
B.
CaSO 4
C.
Ca(OH) 2
D.
CaSO 4 ·2H 2 O
【单选题】听力原文:M: Now, then, Mrs. Darcy. How long has this tooth been giving you trouble? W: Well, I had it filled last year and was all right until last Sunday. Then it started hurting again. Q: How long has t...
A.
For a few days.
B.
For several weeks.
C.
Since last year.
D.
For a few hours.
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