单项选择题

It is implied that the ozone hole over Antarctica is______.

A．a threat to the European people
B．a risk to human health
C．a hazard to southern Chile and Argentina
D．the source of UV radiation
<上一题 目录 下一题>
热门 试题

单项选择题
We can infer from the passage that______.
A．concentrations of greenhouse will become worse
B．Concentrations of greenhouse will become better
C．generally there is no rain in Antarctica
D．the North Pole is no longer covered with ice
单项选择题
According to scientists, to keep down concentrations of greenhouse gases, we should______.
A．stop gas emissions
B．lower the temperature
C．reduce the use of coal, oil, and gas
D．cut off the use of coal, oil, and gas
相关试题