问题
单项选择题
混流式水轮机尾水管肘管里衬由进口的圆形端面渐变过渡到出口（）端面。
A、圆形；
B、矩形；
C、椭圆形；
D、正方形。
答案
参考答案：B
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混流式水轮机尾水管肘管里衬由进口的圆形端面渐变过渡到出口（）端面。
A、圆形；
B、矩形；
C、椭圆形；
D、正方形。
参考答案：B
| 下列各句均有一处错误,，请找出并改正。 | |
| 1. My pen pal live in Australia. 2. Here is some of the letters for you. 3. He is openning the door. 4. Is she mending her bike? Yes,she's. 5. Can Jim's mother making a kite now? 6. Jim enjoyed to live in China. 7. My favourite dog named Huahua. 8. Miss Hua often teach us some English songs. | _____ _____ _____ _____ _____ _____ _____ _____ |