Thestarformationismostcommonlyusedandrequires()onthealternator.
A. oneslip-ring
B. twosliprings
C. threesliprings
D. foursliprings
Meanlowwateristheaverageheightof().
A. thesurfaceofthesea
B. highwatersandlowwaters
C. alllowwaters
D. thelowerofthetwodailylowtides
在Windows中,关于文件夹正确说法是()。
A. 文件夹不能有扩展名
B. 文件夹名的长度最长可达255个字符
C. 文件夹名可以与同级目录中的文件同名
D. 文件夹名必须有扩展名
Ana-cswitchboardisusually()thecorrespondingd-cboardbecauseofthehighervoltageandlowercurrentsandsmallerbus-bars.
A. largerandheavierthan
B. asmuchas
C. smallerandlighterthan
D. moredangerousthan