在单相变压器的两个绕组中，输出电能的一侧叫做二次侧绕组。
参考答案：对
I become ________ in American history.
A．more interested and more interested
B．more and more interested
C．more interesting and more interesting
D．more and more interesting
铺贴卷材时，平行于屋脊的搭接缝应（）。
A.顺主导风向
B.顺流水方向
C.逆主导风向
D.逆流水方向
