房间被书架/设备或隔断等分隔，其顶部至顶棚或梁的距离小于房间净高的()时，每个被隔开的部分至少应安装一只探测器

A.2%

B.5%

C.10%

D.15%

Alice is wearing a __________ / waIt / skirt today.

A．wait

B．what

C．wet

D．white