问题
单项选择题
离心泵备泵启动后,电机反转则()。
A、改变电机接线
B、修理电机
C、修泵
D、清洗过滤器
答案
参考答案:A
离心泵备泵启动后,电机反转则()。
A、改变电机接线
B、修理电机
C、修泵
D、清洗过滤器
参考答案:A
One day, Mr. White told the class that there would be a hobby show. It took all the students the whole morning to get ready for it. 1 , the laziest boy in the class. It was very difficult for the others to believe that he had a hobby. But to their surprise, 2 . Mr White was very happy. After school, Bob was going to take them back. “Bob, you can’t take them back until the others watch them this afternoon,” said Mr White. “But 3 , they are my brother’s,” he answered. “He doesn’t want them to be out of our home for long. He’s afraid that they will be lost.” “ 4 , not someone else’s!” Mr. White became a bit angry. But 5 . “Mr White, it’s true that I have a hobby. My hobby is watching my brother collecting shells.”
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