问题
单项选择题
一般大型发电机定子铁芯为发电机总质量的（）左右。
A.20％；
B.30％；
C.50％；
D.60％。
答案
参考答案：B
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一般大型发电机定子铁芯为发电机总质量的（）左右。
A.20％；
B.30％；
C.50％；
D.60％。
参考答案：B
| 根据对话内容，从下面方框中选择适当的句子补全对话，使对话内容完整、通顺 。 | |
| Li Jun: Good morning,Doctor. Doctor: Good morning. 1.____ Li Jun: 2.____ I've got a pain here. Doctor: 3.____ Li Jun:Since yesterday evening. I couldn't sleep well last night. Doctor:Let me see. Do you feel the pain here? Li Jun:Yes. Is it very serious,Doctor? Doctor: 4.____ But you'd better stay in bed for two days. And I'd like you to take these pills three times a day. 5.____ Li Jun:Thanks a lot,Doctor. Doctor:You're welcome. | |
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