单项选择题
Nitrogen is the most plentiful gas in the
atmosphere.
A．water
B．earth
C．body
D．air
<上一题
目录
下一题>
点击查看答案
打开小程序，免费文字、语音、拍照搜题找答案
热门
试题
单项选择题
Before herbs were available in supermarkets year-round, herb vinegar was made in the fall.
A．obtainable
B．affordable
C．reasonable
D．disposable
点击查看答案
