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【单选题】
钛和钛的合金被认为是21世纪的重要材料，具有很多优良的性能，如熔点高、密度小、可塑性好、易于加工，钛合金与人体有很好的“相容性”。根据钛的上述性质，下列的用途不切合实际的是 [ ]A.
用于作保险丝
B.
用于制造航天器
C.
用于制造船舶
D.
用于制造人造骨
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举一反三
【单选题】—Did you sec anyone coming into the building? —No, I didn’t —______? —There is no doubt about it.
A.
OK
B.
Sure
C.
Really
D.
Is that so
【单选题】听力原文：W：I heard that this movie is very good. Did you enjoy it? M：No, I think it showed too much unnecessary violence. Q：How does the man feel about this movie? (2)
A.
He dislikes it because of too much violence.
B.
He likes it very much.
C.
He thinks highly of it.
D.
He thinks it is boring.
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