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问题 选择题

下列命题中正确的是[ ]

A. 半圆或直径所对的圆周角是直角

B. 相等的角是对顶角

C. 两条直线被第三条直线所截，同位角相等

D. 对角线互相垂直的平行四边形是正方形

答案

答案：A

句型转换

句型转换。

1. I'd like a cup of tea. (变一般疑问句)

                                                                                               

2. Li Ming would like some bread and milk. (就画线部分提问)

                                                                                               

3. What do you want to drink? (变同义词)

                                                                                               

4. He is hungry. He would like a sandwich. (变复数句)

                                                                                               

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问答题 简答题

履带吊为什么不装备支腿设施？
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