为防止直流故障或交直流窜绕导致直流故障,要求在保证安全的前提下,宜录取()母线电压。
A.直流
B.交流
C.交直流
D.以上均不正确
参考答案:A
Three members in our club like rock music, but the rest of us ______ it. [ ]
A. like
B. likes
C. dislike
D. dislikes
具有活血通经、祛瘀止痛功效的药物是()
A.红花
B.丹参
C.泽兰
D.鸡血藤
E.益母草