开口于蝶筛隐窝的鼻旁窦是
A.上颌窦
B.蝶窦
C.额窦
D.筛窦前群
E.筛窦后群
参考答案:B
The display screen is the most common ______ device used to show you what the computer is doing.
A.input B.printing C.output D.electronic
某商场8月份的销售额为16万元,10月份的销售额为25万元,该商场这两个月销售额的平均增长率是( )。