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单选题 5. Fossil fuel fumes are often ______ with toxic heavy metals and chemicals that may enter the blood stream
学科：默认课程
时间：2026-04-30 22:29:38
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题目1单选题
1. Some fumes from diesel vehicles can be so ______ that they increase the risk of premature mortalityA. fineB. respiratoryC. lethalD. dwarf
题目2单选题
2. A fine ______ in polluted air may enter the lungs and cause respiratory problemsA. particleB. componentC. accountabilityD. campaigner
题目3单选题
3. For older people, the mortality rate may increase ______ when they spend more time outside and breathe more polluted airA. dwarfB. considerablyC. fossilD. trigger
题目4单选题
4. Natural dust particles can ______ an asthma attack in people with respiratory problemsA. suggestB. discountC. triggerD. coat
题目5单选题
5. Fossil fuel fumes are often ______ with toxic heavy metals and chemicals that may enter the blood streamA. speculatedB. triggeredC. suggestedD. coated
题目6单选题
6. People who live in areas with serious traffic ______ may be exposed to more polluted air every dayA. congestionB. microgramC. biomassD. fossil
题目7单选题
7. In some cities, pollution from industry and diesel vehicles may contain highly ______ substances that can do further damage to the bodyA. prematureB. volatileC. microgramD. asthma
题目8单选题
8. Researchers did not ______ the influence of natural dust when they studied the mortality rate in different citiesA. triggerB. coatC. discountD. havoc
题目9单选题
9. The report ______ that air pollution in some Western cities may be far more toxic than the average level found elsewhereA. fumesB. coatsC. triggersD. suggests
题目10单选题
10. Some experts ______ that less well educated people may have poorer access to health care in polluted areasA. dwarfB. triggerC. discountD. speculate
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