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【单选题】
D148、严重危害飞机飞行安全的冰雹,通常与下列何种云有关系A.
普通雷暴云
B.
强烈雷暴云
C.
堡状高积云
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举一反三
【单选题】Why can't you see light when you look at a black hole?
A.
Because most black holes are so far away.
B.
Because the gravity of a black hole is so strong that it sucks? the light inward.
C.
Because as the star's gases burn, it stops giving off heat and light.
D.
Because as a star cools, its outer layers pull in toward its center.
【简答题】酶水平的调节包括 、 和 。其中最灵敏的调节方式是 。
【单选题】You look light-hearted. Nothing seems ______ to you.
A.
to happen
B.
to have been happened
C.
to have happened
D.
to be happened
【简答题】How many reasons does the writer list to thank competition?
【简答题】You look
light-hearted. Nothing seems _____ to you.A. to happen B. to have been happened C. to have
happened D. to be happened
【简答题】How many reasons the integrated approach was well receive by the students?
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