物方折射率
参考答案:
物点及其相应光线所处的空间介质的折射率。
She is new here, she has _____ friends here. [ ]
A. few
B. little
C. more
D. less
高血压危象治疗,首选药物为()
A.硝普钠静脉滴注
B.复方降压片口服
C.卡托普利口服
D.氢氯噻嗪注射
E.普萘洛尔口服