B. It is an example of a factor that contributed to the improved birthrate
C. It helps to explain why the death rate is increasing
D. It is an example of a factor that contributed to the improved death rate.
从上边那段话,我们发现medical care只是分号后的一个内容,而分号是带有并列功能的句号,说明前部分也是同一方面的内容。根据例子之前的概述和例子之后的总结所以正确答案应该是D。
2)插入式举例
如见到下列词:for example for instance such as like especially particularly specially in particular 都属于插入式举例,这样服务对象多半在前面。
二、下定义式的考题
A, B A---B---C A or B A which B 等形式
丽丽老师,一个共产主义战士
此类题目定义的改写就是正确答案
例1 In many species, members of the species exhibit aggressive behavior toward one another, often with a focus on territoriality, the fight for exclusive control of a particular area.(在很多物种中,一个物种中成员对另一个产生攻击性行为焦点在地盘性,就是动物在防卫其领土时的打斗行为)
Why does the author include the fight for exclusive control of particular area in paragraph 1?
A. It presents an argument against a previously stated point
B. It provides a definition of a previously stated term.
C. It presents a second area of focus of aggressive behavior.
D. It introduces a new idea to be further developed in the paragraph.
本题很明显就是 territoriality, the fight for exclusive control of a particular area.是一个下定义的标准模式,正确答案: B
例2 Most bird species are known to be territorial to some degree, though the territorial behaviors exhibited by most species are limited to singing contests, which can go on for days or threatening postures with wing lifted or extended.
Why does the author mention singing contests in paragraph 2?