小玲将一篇5000字的社会调查报告录入电脑，那么完成录入的时间t（秒）与录入文字的速度υ（字/秒）的函数关系式是____ ．

下列说法：①直径是弦；②经过三点一定可以作圆；③三角形的外心到三角形各顶点的距离相等；④长度相等的弧是等弧；⑤平分弦的直径垂直于弦．其中正确的是____ （填序号）．

根据短文理解, 从A、B、C、D四个选项中选择组最佳答案填空。

    "Tell me what you are 1 on Sunday morning, Mike," Mr Zhang says. "I'm going to 2 a new film. It's an English film 3 the life of the students in America. Bill tells me it's 4 interesting, "says Mike.

    Mr Zhang wants 5 more, so he asks, "After 6 the film, what are you going to do?" "I'm going to learn Chinese," Mike says. "Do you like it?" asks Mr Zhang. "Chinese is not easy 7 me, but I like it very much. I'm going to work hard 8 it. After lunch I'm going to do my homework. I think I can do it better than before." "Then, 9 about Sunday evening?" Mr Zhang asks." After supper I'm going to help Han Mei 10 her English. She needs my help," Mike says.

    "You are going to have a busy day, aren't you?" says Mr Zhang.

语言运用。
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