选词填空，将序号写在横线上即可。
|
A. pretty
B. fitting room
C. How
D. What
E. sweater
|
A: Excuse me. Can you help me?
B: Of course. ____ can I help you?
A.I am looking for a____
B:____ size do you wear?
A: Medium, I think.
B: Here. How do you like this one?
A: It's ____. Can I try it on?
B: You can try it on in the ____ over there.
,副线圈接有一电流表，与负载电阻串联，电流表的读数为
，在
时，原线圈中电流的瞬时值为0．03
，由此可知该变压器的原、副线圈的匝数比为