变频器不可使用U/F控制方式。
参考答案:错
My mother was against my plan while my father was _____ it.
[ ]
A. in favor of
B. in memory of
C. in need of
D. in search of
()是环渤海中与华北、西北等内陆地区距离最短的港口,是首都北京的海上门户,也是亚欧大陆桥最短的东端起点。
A.上海港
B.青岛港
C.天津港
D.大连港