近日做了两道SC感觉都很怪，两道所用的对称结构一反XDF所说的平衡结构，

在此是否要引入一个功能性平衡的概念。开放给NN们讨论一下，请支持！

(1)

GWD-17-Q18

Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore.

1. Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore.

2. Over the course of the eighteenth century a tripling in the average output of ironwork was due to the replacement of charcoal by coal for the fuel used in the smelting of iron ore, in addition to several improvements in blowing machinery.

3. With charcoal’s being replaced by coal as the fuel used in the smelting of iron ore and several improvements in blowing machinery, the average output of ironwork tripled over the eighteenth century.

4. The replacement of charcoal with coal for the fuel used in the smelting of iron ore and several improvements in blowing machinery, the average output of ironwork tripled over the eighteenth century.

5. Charcoal being replaced by coal as the fuel used in the smelting of iron ore, and several improvements in blowing machinery, which tripled the average output of ironwork over the course of the eighteenth century.

A the best, A是平行结构----功能上的对等,都是表原因.

B , in addition to several improvements in blowing machinery.

C being, one's being done一定是错的

D 名词＋句子的形式，而且名词不是同位语，句子结构错。

(2)

In recent years cattle breeders have increasingly used crossbreeding, in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor.

 (A) in part that their steers should acquire certain characteristics
   

 (B) in part for the acquisition of certain characteristics in their steers

 (C) partly because of their steers acquiring certain characteristics
   

 (D) partly because certain characteristics should be acquired by their steers

 (E) partly to acquire certain characteristics in their steers

句型：....to do...and because......

第一题同意选a,觉得功能平行可以接受

另外觉得除了a,没有更好的了

第二题,觉得选d更好一点,更合理一点,觉得被动也不是什么错误,在没有更好的选项的时候被动也是可以接受的.

汗,才不过一分钟支持e了,主语是人to do....

breeders have used crorssbreeding partly to acuire certain characteristics and partly because

句子主干一提取