以下是引用晴天小狗在2006-11-9 16:34:00的发言：E. Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent have vanished. 有the 那不是表示除了这500个在地球上出现过的生物，还有没出现过的？ 晕死 nn指点... OG176 176. As a result of the ground-breaking work of Barbara McClintock, many scientists now believe that all of the information encoded in 50.000 to 100.000 of the different genes found in a human cell are contained in merely three percent of the cell's DNA.
(A) 50,000 to 100,000 of the different genes found in a human cell are contained in merely
(B) 50,000 to 100,000 of the human cell's different genes are contained in a mere
(C) the 50,000 to 100,000 different genes found in human cells are contained in merely
(D) 50,000 to 100,000 of human cells' different genes is contained in merely
(E) the 50,000 to 100,000 different genes found in a human cell is contained in a mere
OG解释：This question poses two problems: subject-verb agreement and accuracy of expression. Choice E, the best answer, states the matter clearly and grammatically. The subject, all of the information, must be taken as singular because the mass noun information is singular. Choices A, B, and C all mistake the number of the subject and incorrectly use the plural verb are contained. A, B, and D do not make it clear whether 50,000 to 100,000 represents all or a fraction of the genes in a cell. C and D, by referring to cells in the plural, do not make it clear whether the number mentioned is to be found in each individual cell or in a collection of cells. | 
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发表于 2006-11-9 16:30:00
