填空题
There is enough evidence the soot is the main cause of lung cancer.
【参考答案】
N
点击查看答案&解析
<上一题
目录
下一题>
热门
试题
填空题
Smog does great harm to the respiratory system.
点击查看答案&解析
填空题
Smog has become the most serious type of pollution.
点击查看答案&解析
相关试题
And it was once advised that the ...
A magazine of the AHE0s declared ...
Years ago, bee-keeping was much m...
aware
increasingly