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  3. Cardiovascular diseases, which involve the heart and blood vessels, are the leading cause of death in many developed nations. At

Cardiovascular diseases, which involve the heart and blood vessels, are the leading cause of death in many developed nations. At

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问题 Cardiovascular diseases, which involve the heart and blood vessels, are the leading cause of death in many developed nations. Atherosclerosis, a chronic cardiovascular disease, involves the gradual buildup of growths called plaques on the inner smooth muscle wall of blood vessels. As atherosclerosis progresses, the risk of heart attack or stroke increases because a blood clot is more likely to become trapped in an artery that has been narrowed by plaques. Hypertension—high blood pressure—also increases the risk of heart attack or stroke. Sometimes called the silent killer, it may cause no symptoms until a heart attack or stroke occurs. Fortunately, hypertension is simple to diagnose and can usually be treated by medication, diet, exercise, or a combination of these.
All of the following names describe the same disease EXCEPT
选项 A、hypertension
B、high blood pressure
C、heart attack
D、the silent killer
答案C
解析 Heart attack is not the same disease as the others; it is a possible effect of the disease. Hypertension, high blood pressure, and the silent killer are all names for the same disease. Dashes and a comma provide clues: Hypertension—high blood pressure—...; Sometimes called the silent killer, it may cause no symptoms until a heart attack...occurs.
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