单项选择题

According to the passage, alcohol has something to do with bad breath mainly because ______.

A．it keeps offending bacteria from reproducing
B．its smell adds to bad breath
C．it kills some helpful bacteria
D．it affects the normal flow of saliva
<上一题 目录 下一题>
热门 试题

单项选择题
The reason why people might not be able to stay alive in a world without emotion is that ______.
A．they would not be able to tell the texture of objects
B．they would not know what was beneficial and what was harmful to them
C．they would not be happy with a life without love
D．they would do things that hurt each other' s feelings
单项选择题
Mouthwashes are not an effective cure for bad breath mainly because ______.
A．they can' t mask the bad odor long enough
B．they can' t get to all the offending bacteria
C．their strong smell mixes with bad breath and makes it worse
D．they can' t cover the thick layers of mucus
相关试题