丝网精细度
参考答案:
每厘米的经线和纬线数。
促进胃酸分泌的药物是()。
A.氯丙嗪
B.异丙嗪
C.氢氯噻嗪
D.雷尼替丁
E.组胺
As a vessel sinks to a depth of 15 feet,the hydrostatic trip releases the liferaft container from its cradle by().
A.breaking the weak link
B.releasing the tie-down strap
C.pulling the operating cord
D.releasing the CO2 canister