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【单选题】
HIV的核酸类型是A.
单股DNA
B.
双股DNA
C.
股RNA
D.
两条相同的股RNA
E.
股RNA
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【单选题】We could not reason out the way the robbers escaped，because we were unable to find any ________ of them.
A.
chance
B.
trace
C.
point
D.
signal
【简答题】Its operating profit margins, (ysts point out) (a), are only around (half of that) (b) achieved in the industrial activities of General Electric, (the US company that) (c) is a long-time rival to ...
【单选题】The US achieved its predominance after World WarⅡbecause it had made____ efforts towards this goal.
A.
pain
B.
painstaking
C.
painful
D.
painstakingly
【单选题】The US achieved its predominance after World War II because it had made ____ efforts towards this goal.
A.
pain
B.
painful
C.
painstaking
D.
painstakingly
【简答题】利用全站仪进行放样，建站完成后，接着再输入 坐标，根据屏幕提示来完成放样。
【单选题】( America and Americans were prosperous beyond the dreams of the Europeans and Asians whose economies the war had destroyed . ) The US achieved its predominance after World War II because ______.
A.
it had made painstaking efforts towards this goal
B.
its domestic market was eight times larger than before
C.
the war had destroyed the economies of most potential competitors
D.
the unparalleled size of its workforce had given an impetus to its economy
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