D Closer to 1,500 mg.
3. To improve their blood pressure, people should have a diet
A rich in potassium and sodium.
B rich in potassium and calcium.
C rich in calcium and sodium.
D none of the above.
4. The high-risk groups include those
A who are black.
B who are over the age of 40.
C who are white and young.
D both A and B
5. Packaged, processed and restaurant foods are known to be
A cheap.
B tasty.
C rich in salt.
D healthy.
答案与题解
1. D 短文的第一段说,吃盐过多会增加罹患高血压,心脏病和中风的危险。
2. B 短文的第二段说,大多数美国成年人的日食盐量接近300 毫克。
3. B 短文的第三段说,采用低钠并富含钾、钙的饮食方式将有利于改善血压。
4. D 短文的第五段说,黑人和年龄超过40 岁的人被视为高危人群。
5. C 短文的倒数第二段说,人们所食用的纳绝大部分来自于包装、加工和饭店食品。
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