正确答案: A
金刚石
题目:下列物质中,硬度最大的是
解析:A
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举一反三的答案和解析:
[单选题]“未见其人,先闻其声”,就能判断来的熟人是谁,主要是依据讲话人的
音色
[单选题]40.
at all
解析:40.B【解析】由题意“记住你应首先解决大事情,否则你的琐事就解决不好”知选B.
[单选题]28. Teachers think that__________
boys and girls both have their special advantages
解析:28.A【解析】由最后一段第一句话可知.
[单选题]4.Will you _________more sugar _________your coffee?
add,to
[单选题]25. —I'm afraid the meeting has begun.—Don't worry. It _________ . until the bell _________.
won't begin; rings
解析:25.C【解析】not... until...意为“直到……才……”,主句用一般将来时,从句要用一般现在时。故选C。
[单选题]How long did he stay in the elevator?
More than sixty hours. D. From Tuesday to Saturday.