问题
单项选择题
天车控制屏中多采用JT3系列直流电磁式通用泄电器，其直流电源利用二极管整流，（）降压而获得。
A、电磁
B、电流
C、电压
D、电阻
答案
参考答案：D
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天车控制屏中多采用JT3系列直流电磁式通用泄电器，其直流电源利用二极管整流，（）降压而获得。
A、电磁
B、电流
C、电压
D、电阻
参考答案：D
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| Kate is a little girl. She is not 1 . She 2 how to read 3 write. But her sister Mary is a 4 . She is ten. One day, Mary 5 her little sister in the room. She's at the table. There is a pencil in 6 hand (手). She is 7 . "What are you doing, Kate?" she asked. "I'm writing 8 my friend, Rose," says Kate. " 9 how can you? You don't know how to write," says her sister. "Well," says Kate, "It doesn't matter (没关系). Rose doesn't know how to 10 , either (也)." | ||||
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