用大量注射用水冲洗容器
A.180℃3~4小时被破坏 B.不具挥发性 C.易被吸附 D.能被强氧化剂破坏 E.能溶于水以下措施是针对热原的哪项属性
参考答案:E
检测血管的血流是高阻力还是低阻力,可应用频谱多普勒测量()
A.收缩期血流峰值速度(Vs)
B.阻力指数(RI)
C.平均血流速度(Vm)
D.血流速度时间积分(VTI)
E.舒张期血流速度(VD.
—It is two hours_______ he watched TV.
—I think it_______ be interesting. [ ]
A. since; must
B. after; can
C. until; should
D. since; can