(B) and前后不平行,名词discovery和动名词documenting不平行
(C) 使用contributor改变了原句的意思,with意思太广泛,不如include表达意思精确
(D) 正确, and前后平行都是名词discovery, documentation
(E) and前后不平行,前者是动名词discovering,后者是名词documentation
句子结构: In addition to… ,Mary Leakey’s contributions… include her discovery of…and her
painstaking documentation of… 53. (27297-!-item-!-188;#058&003151) Most vaccines are derived from weakened or killed strains of the same virus that they prevent,
(A) the derivation of smallpox vaccine from a different virus altogether
(B) smallpox vaccine, which is derived from a different virus altogether (C) smallpox's vaccine, which gets derived from a different virus altogether (D) when smallpox vaccine is derived from an altogether different virus (E) the altogether different virus from which smallpox vaccine is derived
考点:比较（Comparison）
1) like, unlike后面加名词表示比较，比较对象需对等。
(A) 比较双方不对应,vaccines和the derivation不对应
(B) 正确,比较双方对应most vaccines和smallpox vaccine对比.
(C) smallpox’s vaccine表达错误,原文表达的意思是天花疫苗,而不是属于天花的疫苗.
(D) unlike when用法错误,unlike后面应该加名词表示比较
(E) 比较双方不对应,vaccines和different virus不对应
句子结构:Most vaccines are derived…, unlike smallpox vaccine, which…
54. (27343-!-item-!-188;#058&003156)
treat particular maladies.
(A) Unlike using spices for cooking, in medicinal usage they are taken (B) Unlike spices that are used in cooking, in using spices for medicine, they are taken (C) Unlike cooking with spices, taking spices for medicinal use is done (D) In cooking, small quantities of spices are used, whereas in medicinal usage spices are taken (E) In cooking, the usage of spices is in small quantities, whereas in medicinal usage they are taken
考点:比较（Comparison）
1) 标准书面语中,like后只加名词表比较
(A) unlike后面应该接名词
(B) in using短语既可以修饰前一个分句,又可以修饰后一个分句,造成修饰歧意.
(C) unlike后面应该接名词
(D) 正确, 用whereas表示对比关系前后句子在形式上不需要完全对等,修饰成分紧靠修饰对象,避免
了修饰歧意
(E) the usage of spices is in small quantities表达笨拙;they指代不清,可能指代quantities或者spices.
