When the air is polluted we wear masks to protect our lungs （肺）.What about bees and butterflies？They can't wear masks.
New Scientist magazine recently reported findings from James Ryalls and his team at the University of Reading，UK.Their study found that air pollution is harmful （有害的） to pollinators （傳花粉者） – insects like bees and butterflies.They can't smell flowers because of the pollution.
Pollinators are important.They spread pollen （花粉） among plants with flowers.This helps the flower produce seed and fruit.Without pollinators，farms cannot make food.We all need pollinators.
To do their study，Ryalls' team built eight areas.Then，they piped （吹送） nitrogen oxide （氧化氮） and ozone （臭氧） into six of these areas.The other two areas had normal air.They were the control group.
"The results were much more severe （嚴(yán)重的） than we thought，" said Ryalls.The levels of pollution in their tests were similar to "normal road traffic".In such conditions，70 percent fewer insects entered the area.Once they were there，they didn't hang around.Visits to flowers decreased by up to 90 percent.
Scientists explained that gases like nitrogen oxide and ozone can break down the scents （氣味） of flowers.This makes it hard for insects to find their food.
Maybe the most terrible thing is that the researchers created pollution levels that were legal （合法的） in the UK.Shannon Olsson，a scientist in India，called the results "important" because they show that "safe" levels of pollution keep pollinators away.
"Air pollution is another stress on insects，" said Ryalls. "That adds to all the other stresses causing their numbers to decline （減少）."
（1）What problem may air pollution cause to pollinators？ CC
A．They may have less food to eat.
B．They may eat more fruit and vegetables.
C．They can't smell flowers，so they spread（傳播）less pollen.
D．They may stop flowers giving out scents.
（2）How did the scientists do the research？ DD
A．They recorded（記錄）insects' activities on farms next to busy roads.
B．They brought clean air to places with severe air pollution.
C．They piped nitrogen oxide and ozone into eight areas.
D．They compared（比較）insect behavior in areas with polluted air and normal air.
（3）What happened to pollinators in areas with air pollution？ DD
A．They found food more easily.
B．They could not find each other.
C．They hung out（外出）more often.
D．They visited flowers less.
（4）What does Paragraph 7 show？ BB
A．Pollinators will only work in a "safe" environment.
B．Even "safe" levels of pollution influence（影響）pollinators badly.
C．The law will have less control over air pollution.
D．An environment that is safe for insects is not safe for humans.
（5）What is the experiment in the passage mainly about？ AA
A．The influence of air pollution on pollinating insects.
B．Different levels of air pollution in the UK.
C．Stresses that insects are facing.
D．Causes of air pollution in big cities.
【答案】C；D；D；B；A
【解答】
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發(fā)布：2024/5/27 14:0:0組卷：19引用：2難度：0.8
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