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【简答题】
高性能混凝土有哪些特性?
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皮皮学刷刷变学霸
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【单选题】听力原文：M：Don't forget the show will start at seven o'clock at the People's Theater．I'll meet you at the gate． W：Well，if you don't see me at seven，I will be doing my homework and in that case，you can go ...
A.
She doesn't know where the People's Theater is.
B.
She doesn't think the show will start at seven.
C.
She has homework to do before she goes to the show.
D.
She promises to meet the man at the gate.