题目内容

Why is the girl disappointed after she talked withpeople in the market?

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Eliza,the girl in the video clip, was a flower girl in the market before she was taught the standard English and manners. What do you think about people’s manners? How can manners change a person?

将视频中的例题货物重量改为50吨，运费是（）。

用标重18吨的家畜车运送12吨的活猪，则计费重量是（）吨

在一般位置平面P内取一直线AB，已知ab∥OX轴，直线AB是：

A. 平面内的正平线
B. 侧平线
C. 平面内的水平线
D. 侧垂线