尼玛...碰到个长难句居然是conditional reasoning，放这里留个念。 It is possible to make specific complementary DNA’s （cDNA’s）that can serve as molecular probes to seek out the messenger RNA’s （mRNA’s）of the peptide hormones. If brain cells are making the hormones，the cells will contain these Mrna’S. If the products the brain cells make resemble the hormones but are not identical to them，then the cDNA’s should still bind to these mRNA’s，but should not bind as tightly as they would to mRNA’s for the true hormones. cDNA can detact mRNA Hormones--> mRNA Resembled hormones --> cDNA bind to mRNA but not as tightly as they do for true hormones
发现自己的全划线题做的还是不好 分析愿意往往是因为没有一下看到split点，开始慌，然后看着时间走，更慌，然后就开始一个一个选项找错误，然后思绪就乱了。最后时间也浪费了，题也没做对，怎么才能克服这个问题呢？如果一下看不到split时候怎么办的？ 59. Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
(A)Certain pesticidescan become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals. (B) If used repeatedly in the same place, one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals. (C) If used repeatedly in the same place, one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals. (D)The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective. (E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.
再贴一道 104. Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell. it had not been announced until February 1968.
(A) Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February 1968. (B) Although not announced until February 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted . (C) Although observed by graduate student Jocelyn Bell in the summer of 1967, the discovery of the first sighted pulsar, or rapidly spinning collapsed star, had not been announced before February 1968. (D) The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February 1968. (E) The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February 1968,while it was observed in the summer of 1967 by graduate student Jocelyn Bell. AC时态错，B状语从句省略错，E while在句中有歧义
while 可以表示同时，也可以表示对比，作为initial modifier时候多用作对比。 还有那道题来着... while at the same time，不redundant，while只能表示 对比了。
N+ to be done vs N done N + to be done 表示受人为影响后的属性。eg: the work to be finished N + done 表示事物固有的属性。eg: work finished
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楼主
饭饭。。。其实人家叫慈世平啦。。。 头像真人秀吗？
发表于 2012-4-28 14:47:46
感谢分享
，你可以试下lz一楼有链接。