问题
多项选择题
ZXDU400/600E出现交流接触器不吸合故障，可能的原因有（）。
A、交流接触器线圈烧坏
B、CEPU板损坏
C、交流输入A相缺相
D、交流输入电压过高或过低
答案
参考答案：A, B, C, D
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ZXDU400/600E出现交流接触器不吸合故障，可能的原因有（）。
A、交流接触器线圈烧坏
B、CEPU板损坏
C、交流输入A相缺相
D、交流输入电压过高或过低
参考答案：A, B, C, D
| 从方框中选择最佳选项补全对话，有两项是多余的。 | |
| |
| A: __1___ B: It's a picture of Tom's family. A: __2___ B: Yes. He is eleven years old. He is my classmate. A: Is the man his father? B: Yes. He is a worker. __3___ A: Is this woman his mother? B: __4___ A: __5___ B: Yes, he has got a sister. And he also has two brothers. A: So there are six people in the family. B: Yes, it's a big family. |