单项选择题

幼儿园、学校教室、学生宿舍、老年人照料房屋设施室内装饰装修验收时,室内空气中氡、甲醛、氨、苯、甲苯、二甲苯、TVOC的抽检量不得少于房间总数　的,且不得少于20间。( ） A.
50% B.
60% C.
70% D.
80%

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单项选择题

不属于人体运动保障体系的内容是（）。 A. 呼吸系统 B. 消化系统 C. 泌尿系统 D. 感觉器官

单项选择题

At the same time, Wal-Mart continued to look for retailing opportunities elsewhere, particularly in developed nations where it lacked strong local competitors, where it could gradually alter the shopping culture to its advantage, and where its low price strategy was appealing. ( )

A．对
B．错

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