( )在中低水头、大流量水电站中得到广泛应用。
A.混流式水轮机
B.轴流式水轮机
C.斜流式水轮机
D.贯流式水轮机
参考答案:B
癫痫
23. Everyone should remember it is very important to _____ the balance of nature toady.
A.get
B.make
C.keep
D.Remain