现场发现有触电事故，应迅速使触电者脱离电源并立即进行现场抢救。()
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压力焊是焊接时向金属施加一定的压力而完成的焊接方法。()
By saying "So are the attendant health risks" (Para. 3), the author means _____.
America suffers health risks as well as the overweight problem
B. health risks resulted from overweight are serious too
C. overweight is classified as one of the health problems
D. people have also pay much attention to the possible health risks
"A tip with no iceberg？" (Para. 3) most probably means _____.
A. patients in Canada sometimes do have to wait for nonemergency treatments
B. shortage of funds in Canadian medical system can be resolved easily
C. a big increase in funding is needed in Canada, not a small one
D. delays in nonemergency treatment in Canada are not such a serious problem
We can learn from Paragraph 3 that deep venous thrombosis usually happens because _____.
A. the economy class is not spacious enough
B. there are too many economy-class passengers
C. passengers are not allowed to walk during the flight
D. the low pressure in the cabin prevents blood flowing smoothly
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