我国《生活饮用水卫生标准》规定砷浓度不得超过()。
A.0.001mg/L
B.0.02mg/L
C.0.05mg/L
D.0.01mg/L
E.0.15mg/L
参考答案:D
Children and old people do not like having their daily () upset.
A.habit
B.practice
C.routine
D.custom
小儿鉴别病毒性脑炎与结核性脑膜炎具有鉴别诊断意义的是
A.发热、头痛、呕吐B.脑膜刺激征C.脑脊液糖和氯化物D.昏迷程度E.精神症状