题干
—Police: What's in your wallet?
—Owner: There________some money and two tickets for today's esports competition.
A：is
B：was
C：are
D：were
答案(点此获取答案解析）
A
传感器电阻的倒数与酒精气体的浓度成正比，那么，电压表示数U与酒精气体浓度C之间的对应关系正确的是( )
