作者：英吉
When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.
(A) When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or
(B) When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or
(C) When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by
(D) Any increase in the temperature of a gas is accompanied by either an increase in pressure if it is enclosed in a container, or by
(E) Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by
原文意思：当气体温度升高的时候，气体经常伴随着压力的提升如果气体密闭的话或者伴随着体积的增加如果气体能膨胀的话。
题目分析：原文体现出了一个并列，就是气体会伴随着1和2,在either...or这个连词后面写的应该比较并列，符合这个连词前后并列的只有E。昨天还有学员问我，老师你不是不让用语法的平行并列结构吗？为什么这道题你又用？我解释一下，语法平行并列可以用，有个前提，就是意思上该平行的地方你给我写平行了最好，如果意思上不该写平行的地方你写平行了反而不好，就像我上课说的如果五个动词都用ving这样的形式，但是这五个动词的发起者在意思上不是同一个家伙，那这五个动词的形式最好是不一样的，否则会让人产生误解，而我们以前做题的时候经常图省事，直接找语法平行的，那可能就会错，当考场你发现有一个选项你连意思都不用读，语法上写的和中文的对联一样，小心，有可能是一个语法平行，意思不对的错误答案。
