下列病症中,不属于遗传病的是( )
A:色盲
B:血友病
C:先天性聋哑
D:艾滋病
中国古书记载的“大食”就是指( )
She was so busy ____(look) for her mobile phone that she didn't see a car coming.
在一平方米的墙壁上绘制学校规划图,采用下列哪个比例尺较为合适 ( )