错选B， therefore concluding that the planet's crust harbors 很明显一个伴随状语，看修饰主句的主语显然不合逻辑，所以选择C.

on the other hand, some smaller plants may not even be subject to certain provisions such as permit or reporting requirements by virtue of their size

In the English-speaking world Anton Chekhov is by far better known for his plays than for his short stories, but it was during his lifetime that Chekhov`s stories made him popular while his plays

百分比和绝对值之间的gap

(B)不一定一定要求参加运动的员工的医疗费比不参加的员工医药费低，只要满足员工参加运动后的医药费比参加前医药费低就可以满足。纵向比较而非横向比较

(D)不一定面包和啤酒是唯一含有T的食物，才能让结论成立

错选(D)，在那些得病的成年人中，很少是从儿童那里传染来的。因此即便儿童使用口服的疫苗，对于成年人来说帮助不大

没看懂题目。。。

医生觉得时间不够用【而不是时间变短！！！】，但病人却觉得看病时间变长了----为什么？其实原文已经给出了部分答案：保险公司require physicians to document their decisions in treating patients and to justify deviations from the companies' treatment guidelines所以花在记录上的时间就很长，而B中，因为选择的范围变广了，就进一步使花费的时间变长了，从而使医生觉得时间不够用。

可以有两个思路，一是从找动物园员工和普通人之间的不同着手，而是找30%这个比例本身是不是有问题着手。
B：只会导致动物园员工患病比例高于普通人---与结论相反了
C：也是导致普通人患病比例更低。
D：更可能导致普通人的患病比例低
E：动物园员工患病的原因，与题目无关
A：动物园患病员工就会离职---则现在调查到的患病比例是不正确的，是被低估的，（而患病员工进入社会成为普通大众中的一员，进一步增加了普通大众中患病者的基数）所以可能普通大众的患病比例会比30%高。

x=8 z=9 就不对啊 什么垃圾题

第n次犯同一个错误
xxx of xxx that +v. 动词的主语是第二个xxx 不是第一个

hey are named for the New Mexico site where they were first discovered in 1932.
named for the New Mexico site where first discovered in 1932
熟悉这两个选项的区别

时态，定语从句which和where的区别

B.Although named for the New Mexico site where first discovered in 1932
where引导的定语从句的先行词必须在从句中作状语而不能作主语，因此动词discovered缺少主语。

have been first discovered
discover是点动作，不能用现在完成时

平行，简洁性，习惯用语，不定式和从句的区别

rise和higher重复
higher…than…是习惯用语，higher…over…是不正确的

Heating-oil prices are expected to be higher this year than last
this year's heating-oil prices are higher than last year's prices.
Expectations are for heating-oil prices to be higher this year than last year's
前两个平行是正确的，第三个平行是错误的，体会他们之间的差别

expect身后不能用宾语从句，而应该用不定式

A is employed as B的意思是：A被雇佣为B，A is employed to be B的意思是：A被利用为B
划线部分身后的定语从句who initially promoted new and unfamiliar technology to female customers的提示作用

代词
不定式和ing的区别

(1) James tried to score high in GMAT, but he failed.
(2) James tried scoring high in GMAT.

先用代词排掉BDE,然后用不定式和ing的差别排掉C

Manufacturers have to do more than build large manufacturing plants to realize economies of scale. --->realized economies of scale are operational and organizational, and depend on knowledge, skills, experience, and teamwork—that is, on organized human capabilities, or intangible capital. --->The importance of investing in intangible capital becomes obvious when one looks at what happens in new capital-intensive manufacturing industries. --->(A)

The throughput needed to maintain the optimal scale of production requires careful coordination not only of the flow of goods through the production process(B)(C), but also of the flow of input from suppliers and the flow of output to wholesalers(A) (E)and final consumers.

平行