问题
单项选择题
起动机的全制动转矩和全制动电流均小于标准值，说明（）。
A．电枢绕组或励磁绕组内有短路故障
B．起动机装配过紧
C．在线路中接触电阻过大
答案
参考答案：C
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起动机的全制动转矩和全制动电流均小于标准值，说明（）。
A．电枢绕组或励磁绕组内有短路故障
B．起动机装配过紧
C．在线路中接触电阻过大
参考答案：C
| 从方框中选出适当的句子补全对话，其中有两项是多余的。 | |
| A: What's wrong, Jim? You look unhappy. B: I'm not. I feel a little worried about my English. A: 1 B: I'm not getting along well with it. A: 2 B: Well, I seldom have chances to meet English people. A: 3 B: Where should I go? A: 4 B: But... it seems English people never speak to me. A: Ah! You should speak first. B: 5 A: The weather! English people are always interested in weather.
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