下列调速方法,适应笼型异步电动机的有()
A.变极调速
B.串极调速
C.变压调速
D.变频调速
参考答案:A, C, D
The movie Jurassic Park was a big hit, with its novel idea ___________ a mixture of fear and excitement into people’s hearts.
A.strikes
B.struck
C.to strike
D.striking
下列关于麝香对心血管系统作用的叙述,错误的是()
A.扩张冠脉,增加冠脉流量
B.降低心肌耗氧量
C.强心
D.降压
E.促进血小板聚集