【判断题】热继电器不能用作过载保护,而只能用作短路保护。
【简答题】–_______ of the land is covered with grass. –That’s why there are a lot of ranches here.A. two
thirds B. two third
【单选题】–What do you think of the environment here? –Wonderful! _____of the land ___ covered with trees and grass.
【简答题】“The land of the free and the home of the brave,” these closing words of the U.S. national anthem, “The Star Spangled Banner”, sum up the ideas that many citizens of the United States have for their c...