第26至30題爲題組
We may associate cholesterol with fatty foods; as a matter of fact, the liver produces 75% of the wax substance that circulates in our blood while 26 25% comes fi*om food. There are two main types of cholesterol in human blood: LDL cholesterol is considered the "bad" cholesterol whereas HDL cholesterol is 27 as the "good" cholesterol. At normal levels, the liver releases LDL cholesterol into the blood and also removes LDL cholesterol from the blood with active LDL receptors on the surface of its cells. However, a decreased number of LDL receptors is 28 high LDL cholesterol blood levels.
Both heredity and diet have a significant influence on a person's LDL, HDL and total cholesterol levels. People with inherited disorder 29 develop atherosclerosis and heart attacks during early adulthood. 30 ’ diets that are high in saturated fats and cholesterol boost the levels of LDL cholesterol in the blood.
【題組】29. (A) attend to (B) tend to (C) point to (D) mean to
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