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  3. Which of the following is the main topic of the passage? According to the passage, how much sodium do farmers in northern Japan

Which of the following is the main topic of the passage? According to the passage, how much sodium do farmers in northern Japan

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问题 Which of the following is the main topic of the passage?
According to the passage, how much sodium do farmers in northern Japan consume each day?
选项 A、8,000 milligrams.
B、30,000 milligrams.
C、12,000 milligrams.
D、5,000 milligrams.
答案C
解析 数字推论计算题。参见第二段第一句：The body of an adult needs only about 200 milligrams of sodium a day—the amount in 500 milligrams，or 1/10 of teaspoon，of salt．(一个成人每天仅需要200毫克钠——相当于500毫克盐，即十分之一茶勺盐中的钠含量。)由此可知，1茶勺食盐的钠含量是2，000毫克(200×10)；根据第一段倒数第二句：日本北方地区农民每天食用6茶勺盐(six teaspoons a day)，其中钠含量可推断为12，000毫克(2,000×6)，故选C。
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