B选项为什么不能理解成：如果那些也存活的植物是因为有其他的原因导致他们存活，而不是因为都有h才存活的。就比如说：我吃肯德基长胖，别人也胖，别人也吃肯德基，但不一定就是吃肯德基长胖的，可能别人长胖的原因和我长胖的原因不一样。E选项我觉得：如果肯定，就是说成熟之前都会有h，而成熟之后没有h，那么h可以是一种导致它成长的因素。如果否定，就不能判断。

they指代什么，images？

感觉D都起来最顺，所以选了D... :)

is more localized and resulting in a distinct line 不平行

this agency adopted a unique structure for globalization

题目中的是80 percent of the potential donors they contacted. 而C讲的是without the university's fund-raisers having made any contact with the donors.

不要下意识的认为是组氨酸导致了他能存活

A D introducing 可以排除
而个人认为CE的主要区别是 since 修饰的动词是不同的。
C中 since 这句话修饰的是that has grown rampant in the southern United States 因为后面有逗号隔开，就近修饰原则
而E中的since 前被逗号隔开直接修饰了 has overrun many houses and countless acres of roadside.
在B中since 这句前后都有逗号，我不确定，但是我认为如果当做插入语即状语位置可以移动这一特点的话，这个也是修饰主句谓语部分的。且 这里很容易判断出用 to do 也是可以pass 掉的
但是在逻辑上 它在...时候被引入应该是修饰它疯长的。所以选择C。

必须是company conduct operations！! ！

Og解释e。。点在小词controllable上
If the conditions typically found in white lead factories were particularly bad with regard to safety and hygiene, it could conceivably be the case that SPEW’s contention was true— that is, that the conditions that caused lead poisoning
were controllable. But it might also be the case that an uncontrollable aspect o f those conditions caused lead poisoning. Thus, this neither supports nor undermines SPEW’s contention clearly.

也就是说each是they 的同位语；for each of them和they 使得句子redundancy

这题的答案是什么？

mark 这题的几个点感觉自己完全不懂

A as well as B 有主次顺序，A是主要的B是次要的会改变and原来的意思排除ce
选项A，expend for 搭配错误，同时and前后不平行，
选项B正确，大平行夹着小平行，they无歧义的指向前面唯一一个复数名词images。
选项C，construct有专有名词construction则不该使用 ing形式

毕老师，这题的B选项为什么不正确呢？如果总人口下降，domestic production不变，不是per capita也会升高从而满足需求不需要进口吗？

c The original sentence clearly stated that the habitat of specific freshwater snails has enlarged. These snails are the parasite’s hosts.
On the contrary, this choice implies that the habitat of freshwater snails (not any specific freshwater snails) has enlarged and by the way these snails become the parasite’s hosts. Thus, this choice no longer communicates the specificity of the freshwater snails as intended by the original sentence.

想问下e里的usual是怎么省略的，还原之后是than the usual prices吗

substitute A for B ,用a代替b