(4) 凭借具有指示作用的形容词或代词来寻找重复
Longdale and Stern discovered that mitochondria and chloroplasts ___ a long, identifiablesequence of DNA; such a coincidence could be ___ only by the transfer of DNA between thetwo systems.
A. manufacture.. accomplished B. reveal.. repeated C. exhibit.. determined
D. share.. explained E. maintain.. contradicted
下半句的such a coincidence说明第一空格的动词填入后应体现为是一种巧合,两个看不懂是什么的、只知道是不一样的东西(非相关专业的绝大部分学生是不太可能认 识mitochondria和chloroplasts这两个词的)怎样了一个长的、可以认为是一模一样的DNA序列就是一个巧合呢?当然只有D的 share表示了这个意思。
Laws do not ensure social order since laws can always be ___ , which makes them ___unless the authorities have the will and the power to detect and punish wrongdoing.
A. contested.. provisional B. circumvented.. antiquated C. repealed.. vulnerable
D. violated.. ineffective E. modified.. unstable
Which指代逗号前面的那句话,也就是“法律不保障社会秩序”,这就使得法律怎样呢?当然只有D选项的ineffective符合句意。
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2016-09-27
2016-09-27
2016-09-27
2016-09-27
2016-09-27
2016-09-27