在纯电阻电路中,在电阻两端为正弦交流电时,则电流也为正弦交流电流,且与电压同相位。()
参考答案:对
在石油中主要含有烷烃、环烷烃、芳香烃和烯烃。
----Your T-shirt looks nice. Is it ______wool?
----Yes, and it’s a ______Inner Mongolia.
A.made of, made by
B.made of, made in
C.made by, made for
D.made by, made from