隔离开关分闸操作时,在分闸开始如发生电弧,则应将隔离开关()
A.停止操作
B.迅速合上
C.迅速回拉
D.保持原速合上
参考答案:B
不出现于蛋白质中的氨基酸是
A.谷氨酸B.瓜氨酸C.精氨酸D.天冬酰胺E.亮氨酸
As we are _____ Table Cloth, we should be pleased if you would send us your best quotations.
A.in the market forB.on the market forC.entering the market for D.at the market for