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Section 1 Question 9:
Researchers have found that the levels of most strong-smelling sulfides and other compounds in the breath of garlic-eaters decline within a few hours of eating it. However, high levels of two sulfide compounds and of acetone are found in the breath more than 30 hours after eating. After a day, for example, the acetone level in the breath is typically more than 5 parts per million. Acetone can be produced by the breakdown of fatty blood compounds, including cholesterol. Crushed garlic gives off acetone at about 10 parts per billion.
Of the following, the researchers would be most justified in concluding that
A most of the acetone in a garlic-eater's breath comes from the ingested garlic.
B in the body, acetone from garlic interacts with cholesterol to cause the breakdown of sulfides.
C after 24 hours, the body has broken down approximately 50% of the acetone ingested from the garlic.
D digested garlic causes the body to produce some sulfides.
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