进行设计验证时，责任设计单位至少应确定和使用()种验证方法其中的一种方法，或使用多种方法的组合。
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The first sentence in Paragraph 1 is used by American school children because______.
A. it represents typical American culture
B. it represents nine planets in the solar system
C. it is often used in teaching astronomy
D. it is a good example of mnemonics
By using the word "correlates"(Line 7, Paragraph 3), the author implies that______.
A. drinking alcohol might cause diabetes
B. both types of diabetes are related to alcohol consumption
C. drinking alcohol is good for people with diabetes
D. drinking alcohol might lower the risk of diabetes
It can be inferred from Paragraph 3 that______.
A. alcohol can lower the risk of plaque in arteries
B. some components of wine is bad for health
C. chocolate is good for health
D. alcohol can be used as medicine
According to Dr. Walter Willett, for good health, people could drink______.
A. only red-wine
B. beer
C. some whisky
D. any alcohol
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