问题问的是同时解释三个现象的factor
B项：This helps explain all three factors. It suggests that each company has had to boost its research spending, but with a narrowing of focus to produce mass-market drugs with enormous potential for profit. This narrowing of focus could explain why fewer drugs are being patented.
Salim的话说明这句话”If those segments also provide significant support to Mr. Quintana, then no segment of the electorate that provides significant support to Mr. Quintana provides significant support to Mr. Ramirez.”的结论then...是假，所以其前提if...也是假，即得出：这些支持P的选区全部支持Q是假
The meaning is not clearly expressed in A. Are the scientists really hoping "in their attempt"? Not exactly. Their attempt shows that they are hoping, certainly. In addition, "at cleaning" is the wrong idiom; we want "to clean" here.
a, to be of 逻辑上的宾补
b, 宾补用了doing，acknowledge变为被动语态的时候，约束力比较强，要跟to do
c, 这件事被acknowledge，然而被承认的是它的工作，而不是这件事情
d, there be句型，核心词是there is acknowledgement
e, importance has been acknowledged
a, any other known insect
b, any insect → 语义错误，自己不能和自己比
c, 主语是midge，谓语动词spends→ 和a有成分的差异。a的意思是花费整个生命周期情况下和其它昆虫不一样。意思是所有的species都是spending entire life cycle，只是midge和别的不一样。
c的意思是不一样之处在于midge在雪里面生活
d,because状语从句就近修饰known
e,spending伴随状语就近修饰
b, though without taste and odor, 状语→描述修饰动作，修饰is detectable的状态
然而，没有气味和味道应该是定语修饰drop（一滴）
c, A is done by B ，是个主谓宾结构→a选项是个主系表结构：这样的一滴是有潜力检测的（无法证明辣椒素辣）
c是这样的一滴可以被人检测出来
bottom line
(business 商) the amount of money that is a profit or a loss after everything has been calculated
• 最终赢利(或亏损)；损益表底线:
»The bottom line for 2004 was a pre-tax profit of £85 million.
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问题问的是同时解释三个现象的factorB项：This helps explain all three factors. It suggests that each company has had to boost its research spending, but with a narrowing of focus to produce mass-market drugs with enormous potential for profit. This narrowing of focus could explain why fewer drugs are being patented.