OG-5-26

charya

答案到底是C还是D呢？看解释向D，可是明明写着C？

supermonkey

以下是引用charya在2005-8-29 16:38:00的发言：

答案到底是C还是D呢？看解释向D，可是明明写着C？

26.

D is the best answer. In identifying the main topic of the passage, you must consider the passage

as a whole. In the first paragraph, the author provides a historical context for the debate described

in the second paragraph, concerning when and how the determination of embryo cells takes place.

The third and forth paragraphs provide a specific example of the “Recent discoveries in molecular

biology” (lines 28-29) that may lead to the resolution of that debate.