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【单选题】
下面几种坝型中，( )的超载能力最强。A.
重力坝
B.
拱坝
C.
土
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举一反三
【单选题】When Pa was leaving, Ma was worried because ______.
A.
it might not be worth the effort going a long way to trade things
B.
the weather was not fine and the road was dangerous
C.
Pa might not be able to return before dark
D.
she and the girls would be without protection
【单选题】Many important officers were ______ in that case.
A.
included
B.
involved
C.
contained
D.
revolved
【单选题】As mentioned in the text, the Wednesday's hearing revolved around ______.
A.
the precise capabilities of spy satellites in orbit
B.
NASA's indecisions against checking upon the Columbia
C.
NASA's rejection of satellite images offered
D.
the coordination between NASA and military offices
【单选题】In a telephone survey of more than 2, 000 adults, 21% said they believed the sun revolved(旋转)around the earth. An【C1】______7% did not know which revolved around【C2】______. I have no doubt that【C3】____...
A.
excessive
B.
extra
C.
additional
D.
added
【简答题】When children say sounds like “ba ba ba ba” “pa pa pa pa” “ma ma ma ma”, they undergo the stage of ____________.
【单选题】堆积密度、人工砂坚固性检验所用试样()。
A.
必须经过人工四分法缩分，才能进行试验。
B.
必须经过分料器缩分，才能进行试验。
C.
可不经缩分，在拌匀后直接进行试验
D.
可不经缩分，直接进行试验
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