电吹风的降压电阻丝是为()供电。
A.发热丝
B.电动机
C.温控器
参考答案:B
----You should have a part-time job.
----I don’t _____you,Mum,I am too young to do that.
A.look out for
B.catch up with
C.get along with
D.agree with
当河流的断面宽深比≥( )时,可视为矩形河流。
A.15
B.20
C.25
D.30