对食品进行大肠菌群的检验，主要是为了判断食品是否受到粪便的污染。
参考答案：错
She got stuck in a terrible traffic jam on the highway to Shanghai, or she dinner with her family now.
A．will be having
B．would be having
C．is having
D．was having
患者男性，25岁，体重60kg。不慎被开水烫伤，自觉剧痛，头面部、颈部及双上肢均为水疱。
此病人的烧伤面积为
A．30%B．20%C．27%D．32%E．35%
