直流电发电机的电枢绕组要装许多个线圈的原因是（）。

A.以便得到很平稳的直流电动势

B.美观

C.提高电压

D.提高电阻

W: I’ve been working out the gym since January. I was a bit out of shape.
M: You look terrific. It seems that your effort has paid off.
Q: What does the man imply about the woman().

A. She must have paid a lot for the gym.

B. She is known to have a terrific figure.

C. Her gym exercise has yielded good results.

D. The professor’s suggestion is constructive.