问题
单项选择题
采用三相一次重合闸的线路断路器，不宜投外加的非全相运行保护（或称三相不一致保护）.若投，则其动作时间宜不小于（）.
A、0.5秒
B、1秒
C、1.5秒
D、2秒
答案
参考答案：A
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采用三相一次重合闸的线路断路器，不宜投外加的非全相运行保护（或称三相不一致保护）.若投，则其动作时间宜不小于（）.
A、0.5秒
B、1秒
C、1.5秒
D、2秒
参考答案：A
| 根据短文内容，用方框中所给的单词填空。 | |
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| On Mother's Day, a man stopped at a flower shop to order some flowers to be mailed to his mother who lived two hundred miles away. As he got out of his car he 1 a young girl crying. He asked her what was wrong and she answered,"I want to buy a red rose for my mother,but I only have seventy-five cents,and a rose 2 two dollars. "The man smiled and said," Come on in with me. I'll buy you a rose. " He bought the little girl her rose and ordered his 3 mother's flowers. As they were leaving he 4 the girl a ride home. She said,"Yes, please. You can take me to my mother. " She directed him to a cemetery (墓地) ,where she placed the rose on a grave (坟墓). The man went 5 to the flower shop, canceled (取消 ) the mail order, picked up the flowers and drove two hundred miles to his mother's house. |