困惑！！向NN们请教！感谢！！

来自补充250题。

15．Acid rain and snow result from the chemical reactions between industrial emissions of sulfur dioxide and nitrogen oxides with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.

(A). with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.

(B) with atmospheric water vapor producing highly corrosive sulfuric and nitric acids.

(C) and atmospheric water vapor which has produced highly corrosive sulfuric and nitric acids.

（D）and atmospheric water vapor which have produced sulfuric and nitric acids which are highly corrosive

(E) and atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.

答案E.  不定式好像并为遵照“and”的平行规则啊？不太懂为何选E?

16．
                It is characteristic of the Metropolitan Museum of Art, as of virtually every great American museum, the taste of local collectors has played at least as large a part in the formation of their collections as has the judgments of the art historian.

(A) of virtually every great American museum, the taste of local collectors has played at least as large a part in the formation of their collections as has

(B) of virtually every great American museum, that the taste of local collectors has played at least as large a part in the formation of their collections as has

(C) it is of virtually every great American museum, that the taste of local collectors has played at least as large a part in the formation of its collections as have

(D) it is of virtually every great American museum, that the taste of local collectors have played at least as large a part in the formation of its collections as have（C）

(E) it is of virtually every great American museum, the taste of local collectors has played at least as large a part in the formation of its collections as has

答案是c. 不太清楚c中its 是指代什么？ taste么？  has 的subject是谁哦？

sulfur dioxide and nitrogen oxides 是在of领导下的，而题中的第一个and是between...and...中的，所以a,b错，而c,d中的which没有就近指代，就算就近指代了，c单复数错，d太啰嗦

第二题的主句是个强调句，that后面是个完整的句子，has的主语是the taste ，have的主语是the judgments，这是一个对比

1.the chemical reactions between industrial emissions of sulfur dioxide and nitrogen oxides with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids

the chemicial reaction between A(industrial emissions of sulfur and nitrogen) and B(water vapor)to produce C

工业排放的硫磺氧化物、氮氧化物和水蒸汽之间的化学反应产生了腐蚀性的硫磺酸和氮酸。

2.its认为指的是museum

明白了~~

谢谢指点！