向下列物质的水溶液中加入AgNO3溶液,有白色沉淀产生的是 [ ]
A.CH3Cl
B.NaCl
C.KClO3
D.CCl4
答案:B
— Are you worried when your son often plays computer games?
— Yes. I think playing computer games _____ on teenagers. [ ]
A. have a good effect
B. has a good effect
C. has a bad effect
D. have a bad effect
属于卫生部"八项承诺"之一的是()
A.实事求是,杜绝虚假
B.尽力方便患者,主动配合临床
C.遵守制度、常规,严防差错事故
D.工作极端负责,准确、及时、安全
E.拒绝接受患者及其亲友馈赠的"红包"、物品