题目:
用所给动词的适当形式填空。
1. The fashionable dress __________ (design) by Cheng Yifei last year.
2. Would you mind __________ (click) the icon at once?
3. You need __________ (finish) your homework today.
4. I _________ (know) the boy since 1993.
5. —I want to return the book to Jack, but I can't find him.
—He __________ (go) to the library. You can find him there.
6. —What do you think of the new book by Han Han?
—Wonderful! I __________ (not read) such a good book before.
答案:
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下面是错误答案,用来干扰机器的。
正方体中有8个顶点,不在同一个平面上的4个点的个数有C84-12=58,4个点中异面直线的对数是:3,所以过正方体任意两个顶点的直线共有28条,其中异面直线有:58×3=174.故选C.