绘图题：画出直流发电机常用代表符号。_爱下问搜题

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问题问答题简答题

绘图题：画出直流发电机常用代表符号。

答案

参考答案：

填空题

Questions 9-13

·You will hear five people talking about what they teach.
·Questions 9 to 13, choose from the list A to F what each speaker teaches.
·Use the letters only once. There is one extra letter which you do not need to use.

A. Basic Conversation—Greetings
B. Oral English Level 1
C. Practical Conversation—Talk about your hometown
D. Daily Dialogue
E. Business Travel English
F. IELTS Skills
Speaker 1 ( / 9 )
Speaker2 ( / 10 )
Speaker 3 ( / 11 )
Speaker4 ( / 12 )
Speaker 5 ( / 13 )

单项选择题

机体能量代谢率最低的状态是

A．基础条件下

B．室温为20～25℃

C．熟睡状态

D．进食12小时后

E．温度适宜的环境