题干
It was said that the famous pop star was found ___ suicide in a hotel near the seaside.
A：commit
B：to commit
C：to have committed
D：committing
答案(点此获取答案解析）
C
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( )
的部分图象如右图示，
分别为
