问题
选择题
The woman sold the eggs ________ seven dollars and they were sold ________ half price.
A．with, at
B．for, at
C．at, in
D．by, on
答案
B
因为以多少钱买卖用for；但与price连用，表示以某种价格买卖时，用at
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The woman sold the eggs ________ seven dollars and they were sold ________ half price.
A．with, at
B．for, at
C．at, in
D．by, on
B
因为以多少钱买卖用for；但与price连用，表示以某种价格买卖时，用at
小明想知道弹簧测力计的测力原理，于是他在实验室中做了实验，数据如下表所示，请你帮他分析数据并总结出结论．
弹簧原长：10cm
| 拉力（N） | 0 | 2 | 4 | 6 |
| 长度（cm） | 10 | 11 | 12 | 13 |
| 伸长（cm） | 0 | 1 | 2 | 3 |