ABC a critique 明显作Essay on Heat and Light的同位语，所以并列的应该也是名词成分（a vision）作同位语 A选项正确
DE critiquing all chemistry 现在分词短语作状语，修饰主句动词presented the results，逻辑主语是主句主语Humphry Davy。所以此时后面并列成分也要是现在分词作状语。
maintaining the conditions for human existence on land, moderating temperature by the absorption of heat and carbon dioxide和 giving pure water back to the atmosphere through evaporation都是作play an essential role的状语成分。逻辑上是一致的，都指在哪方面扮演了重要角色。所以应该平行。逻辑平行导致语义平行，所以先看逻辑。
A：satellites 可数 ，复数，后定从that is应为that are;15 years effort , effort前需要形容词 15-year;effort of 应为effort to表目的
B: is ，错误；how,表示地球的各种元素和scrutiny 互相影响？
C：15 years，part of 指代satellites 还是 AM-1 ?how,表示地球的各种元素和scrutiny 互相影响？
D：that has subjected修饰15 years ？part of an effort ？
1. DE：being colder, having been colder, 修饰analysts,错误。D，usually（副词）和前面的colder（形容词）不平行
2. C：usually错误同D，which指代regions，错误
3. A： was usual，was多余；which指代不清
1. In two letters 位置不对，好像在修饰 the great eruption of Vesuvius
2.being the only eyewitness修饰the nephew of Pliny the Elder，错误
3. writing to 分词做后置定语，修饰the nephew of Pliny the Elder，错误
4. 同A
扫描二维码，直接登录
啊 读句子不认真，单复数排除DE，比较对象排除AC，得B。