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【单选题】
Some radio waves()the curvature of the Earth because of their()wave lengths. .A.
can follow/altitude
B.
can hardly follow/ short
C.
are unable following/angle
D.
are capable of following/distance
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【单选题】A: My mother and father don't fight very often. B: ____
A.
That's good.
B.
It's very loud.
C.
That's too bad.
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