既是麻醉药又是抗心律失常药物是()
A.利多卡因
B.心痛定
C.胺碘酮
D.心得安
E.异丙肾上腺素
参考答案:A
—________you like that latest type of car so much, why not buy it?
—Well, I can't afford so expensive a car.It is worth 200,000 yuan.[ ]
A. As if
B. Even if
C. Now that
D. In case
热电偶的两个热电极()。
A.正极、负极之分,不能接反了
B.有正极、负极之分,但可以随便接
C.没有正极、负极之分,可以随便接
D.没有正极、负极之分,但对连接导线有要求