36套第2、3套几个问题求助！！！！！急！！

韩小星

36套第20套 第2篇
   For some time scientists have believed that cholesterol plays a major role in heart disease because people with familial hypercholesterolemia, a genetic defect, have six to eight times the normal level of cholesterol in their blood and they invariably develop heart disease. These people lack cell-surface receptors for low-density lipoproteins (LDL‘s), which are the fundamental carriers of blood cholesterol to the body cells that use cholesterol. Without an adequate number of cell-surface receptors to remove LDL‘s from the blood, the cholesterol-carrying LDL‘s remain in the blood, increasing blood cholesterol levels. Scientists also noticed that people with familial hypercholesterolemia appear to produce more LDL‘s than normal individuals. How, scientists wondered, could a genetic mutation that causes a slow-down in the removal of LDL‘s from the blood also result in an increase in the synthesis of this cholesterol-carrying protein?
  Since scientists could not experiment on human body tissue, their knowledge of familial hyper- cholesterolemia was severely limited. However, a breakthrough came in the laboratories of Yoshio Watanabe of Kobe University in Japan in 1980. Watanabe noticed that a male rabbit in his colony had ten times the normal concentration of cholesterol in its blood. By appropriate breeding, Watanabe obtained a strain of rabbits that had very high cholesterol levels. These rabbits spontaneously developed heart disease. To his surprise, Watanabe further found that the rabbits, like humans with familial hypercholesterolemia, lacked LDL receptors. Thus, scientists could study these Watanabe rabbits to gain a better understanding of familial hyper-
cholesterolemia in humans.
       rior to the breakthrough at Kobe University, it was known that LDL‘s are secreted from the liver in the form of a precursor, called very low-density lipoproteins (VLDL‘s), which carry triglycerides as well as relatively small amounts of cholesterol. The triglycerides are removed from the VLDL‘s by fatty and other tissues. What remains is a remnant particle that must be removed from the blood. What scientists learned by studying the Watanabe rabbits is that the removal of the VLDL remnant requires the LDL receptor. Normally, the majority of the VLDL remnants go to the liver where they bind to LDL receptors and are degraded. In the Watanabe rabbit, due to a lack of LDL receptors on liver cells, the VLDL remnants remain in the blood and are eventuallyconverted to LDL‘s. The LDL receptors thus have a dual effect in controlling LDL levels. They are necessary to prevent oversynthesis of LDL‘s from VLDL remnants and they are necessary for the normal removal of LDL‘s from the blood. With this knowledge, scientists are now well on the way toward developing drugs that dramatically lower cholesterol levels in people afflicted with certain forms of familial hypercholesterolemia.


4. The passage supplies information to answer which
of the following questions EXCEPT?
A Which body cells are the primary users of
cholesterol?
B How did scientists discover that LDL‘s are
secreted from the liver in the form of a precursor?
C Where in the body are VLDL remnants
degraded?
答案是AC，从哪里可以看出A选项呢？需要定位到哪里？

6. The passage implies that Watanabe rabbits differ
from normal rabbits in which of the following ways?
(A) Watanabe rabbits have more LDL receptors
than do normal rabbits.
(B) The blood of Watanabe rabbits contains more
VLDL remnants than does the blood of
normal rabbits.
(C) Watanabe rabbits have fewer fatty tissues than
do normal rabbits.
(D) Watanabe rabbits secrete lower levels of
VLDL‘s than do normal rabbits.
(E) The blood of Watanabe rabbits contains fewer
LDL‘s than does the blood of normal
rabbits.

答案是B，我选的是E  我觉得定位段是最后一段加粗部分，为什么E错B对呢？

36套第20套 第3篇
Discussion of the assimilation of Puerto Ricans in the United States has focused on two different factors: social standing and the loss of national culture, depending on whether the commentator is North American or Puerto Rican. Many North American social scientists consider Puerto Ricans as the most recent in a long line of ethnic entrants to occupy the lowest rung on the social ladder. Such a ―socio-
demographic‖ approach tends to regard assimilation as a benign process. In contrast, the ―colonialist‖ approach of island-based writers tends to view assimilation as the forced loss of national culture in an unequal contest with imposed foreign values. There is, of course, a strong tradition of cultural accommodation among other Puerto Rican thinkers, like Eugenio Fernandez Mendez. But the Puerto Rican intellectuals who have written most about the assimilation process in the United States all advance cultural nationalist views, advocating the preservation of minority cultural distinctions and rejecting what they see as the subjugation of colonial nationalities.

8. In the context in which it appears, "subjugation" in the
last sentence most nearly means
○A accommodation
○B subjection
○C assimilation
○D incorporation
○E defeatism

为甚么选B，文章有出现C和A选项的单词的呀。而且意思和B差不多~~

求各位帮忙~~

Michelle2011

LDL 4 A (7,8行）  6 ADE都反了  是考的是三段的对比
8  ACD都是同化， 吸收的意思 Ｅ是屈服

韩小星

B的意思不也是屈服么？？

angengsam

个人觉得第八题应该选“assimilation”，同化。