问题
单项选择题
铁壳刀开关容量选择一般为电动机额定电流的（）倍。
A．1
B．2
C．3
D．4
答案
参考答案：C
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铁壳刀开关容量选择一般为电动机额定电流的（）倍。
A．1
B．2
C．3
D．4
参考答案：C
| 从下面方框中选择适当的词，并填在横线上。 | |
mother is a teacher. She works in a . She goes to work by bike every day. My aunt works at a . She sells books. My uncle is a . He has a red taxi. My grandmother is a factory . She is working now. |