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1.Studies confirm that people who eat fish rich in omega-3 acids are generally healthier and have lower rate of cardiovascular diseases than people who did not eat such fish. Now, plans are underway to add omega-3s to other foods, such as orange juice and bread, so that people can have the benefit of a diet rich in omega-3s without eating fish. Scientists have managed to add the omega-3s without adding the fishy smell or taste, thus making it more likely that people will find products palatable.
Which of the following would it be most useful to investigate in order to determine whether the plan will achieve its goal of making people healthier?
A Whether people who eat fish tend to eat less foods that are likely to have a detrimental effect on cardiovascular health?
B Whether eating fish is correlated with health benefits in addition to reduced risk of cardiovascular disease?
C Whether potential health benefits will outweigh price as a factor in consumers’ food-buying decisions?
D Whether high concentration of Omega-3s occur naturally in foods other than fish?
E Whether people who avoid eating fish do so because of fish’s smell or taste?
2. Solar radiation is a cause of skin cancer. In the United States, skin cancer is more common on the left side of the face than on the right. Some dermatologists hypothesize that this difference is due to drivers in the United States being directly exposed to solar radiation on the left side of the face more often than on the right, since cars in the United States have the driver's side window to the driver's left.
Which of the following, if true, most strongly supports the dermatologists' hypothesis?
(A) Many people in the United States who develop skin cancer do not regularly drive a car.
(B) When the windows of a car are closed, they absorb much of the harmful solar radiation to which drivers would otherwise be exposed.
(C) In countries where cars have the driver's side window to the driver's right, skin cancer is more common on the right side of the face.
(D) In the United States, most drivers who are diagnosed with skin cancer continue to drive after being diagnosed.
(E) Many people who spend more time driving than the average also spend more time out of doors than the average.
参考答案：
AC
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发表于 2021-6-21 01:45:36
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