饮用水的基本卫生要求不包括()
A.净化消毒设施完善
B.感官性状良好
C.水量充足,取用方便
D.流行病学上安全
E.所含化学物质对人体无害
参考答案:A
“中国新九分法”中手掌面积约为体表面积的()
A.1%
B.2%
C.3%
D.4%
The doctor recommended that you ___ swim after eating a large meal. [ ]
A. wouldn't
B. couldn't
C. needn't
D. shouldn't