选用压力表时其量程应为工作压力的()倍,最好选用工作压力的()倍。
参考答案:1.5-3.0;2
He didn't believe the explanation of the detective and determined to get to the ________ of the case
on his own. [ ]
A. occasion
B. discovery
C. root
D. condition
相互作用延缓或降低抗药性的联合用药是()
A.阿托品联用氯磷定
B.青蒿素联用乙胺嘧啶
C.阿托品联用普萘洛尔
D.普萘洛尔联用硝苯地平
E.甲苯磺丁脲联用氢氯噻嗪