国内生产的底盘测功机大多数采用()作为功率吸收装置。
A、水力测功机
B、电力测功机
C、电涡流测功机
D、惯性飞轮
参考答案:C
实证常见于外感病的哪个阶段
A.末期
B.初期
C.各个阶段
D.初期或中期
E.以上均非
----How many students are there in your class?
---- __________ number of the students in our class __________ 40.
A.The , is
B.The, are
C.A, is
D.A, are