---I have _______ to apologize for the slight damage to your recorder. --- Never mind. A. after all B. in the first place C. at first D. as usual 答案:B 解析: at first一般放在句首句末不放在句中
有人设想,宇航员站在月球上,突然飞来的流星落在他的不远处,那么对于这位宇航员来说,下列结论正确的是
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A.他能用耳朵听到撞击声
B.他像看无声电影一样,完全感知不到声音
C.他能清晰地感知声音
D.无法确定他能否感知声音