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【单选题】
9 ， 54 ， 189 ， 468 ，（ ）A.
936
B.
945
C.
523
D.
657
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【单选题】Scientists say that something very serious is happening to the earth. It will begin to get 【B1】 in the following years. There will be major changes in 【B2】 in the new century. Coastal waters will have...
A.
warmer
B.
colder
C.
better
D.
worse
【单选题】Scientists say that something very serious is happening to the earth. It will begin to get 56 in the following years. There will be major changes in 57 in the new century. Coastal waters will have a 5...
A.
warmer
B.
colder
C.
better
D.
worse
【简答题】在基地总压力不变的前提下,增大基础埋深对土中应力有什么影响?
【单选题】More and more US students begin to learn Chinese at school ______ it is very difficult. [ ]
A.
so
B.
before
C.
until
D.
though
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