问题
选择题
下面说法不正确的是[ ]
A．三角形的面积一定，底和高成反比例
B．长方形的周长一定，长和宽不成比例
C．订阅《少年报》的份数和总钱数成正比例
D．因为圆周长C= πd，所以π与d成反比例
答案
答案：D
解：A、三角形的底×高= |
周长（一定），是和一定，不是乘积或比值一定，不成比例，此句正确；
补全对话，情景问答
| 选择句子，补全对话，其中有两项是多余的。 | |
| A: Hello, sir, may I talk with you in English? B: Of course. A: I have learned English at school for one year. I have very few chances to talk with the English-speaking people. 1______ B: Oh, you speak English very well. A: Thank you. By the way, 2______ B: No, I'm not. 3______ A: How long have you been in this city? B: 4______ A: I see. Do you like this city? B: Yes. I like it very much. It's a beautiful city. A: Thank you. 5______ | |
|