每桶0.1%苯扎溴胺溶液泡手时，限泡人次为
A．30人
B．50人
C．60人
D．40人
E．55人
参考答案：D
解析：超过40人次后即丧失消毒作用。
西符海棠
It is reported that the United States uses energy as the whole of Europe.
A．as twice
B．twice much
C．twice much as much
D．twice as much
