一道JUST AS 的题，，，求教。。。谢谢了

chaomat1988

1.        Dr. Hegsted argues that just as polio vaccine is given to everyperson to protect the few who might actually contract polio, mass dietarychange is needed to protect the significant number who are susceptible to thelife-threatening effects of press eating habits.
(A) just as polio vaccine is given to every person to protect the fewwho might actually contract polio
(B) like polio vaccine, which is given to every person to protect thefew who might contract polio
(C) similar to polio vaccine which is given to every person in order toprotect the few who might actually contract polio
(D) while, to protect the few who might actually contract polio, poliovaccine is given to every person（A）
(E) similar to the giving of polio vaccine to every person in order toprotect the few who might contract polio actually
答案A，，我选了B。。。       答案说JUST AS .....SO 结构的SO可以省略 ， 请问是？？？    很疑惑，，，为什么这里B不行

AMBER513

看一下！               

eminsummer

As 与Like 最关键的一点区别是，Like 后面一定不能接从句，而as可以。所以楼主看看，一下这俩，哪个是错的？

LIKE her brother DID, Ava aced the test
AS her brother DID, Ava aced the test.

Rosalind_96

like和just as最主要的区别用简单的文字很难一下子说明白，直接上例子：
Like the shark, this kind of newly discoevered fish has long fins.
用like表达的意思是：shark和这种新发现的fish都has long fins，也就是说，这个动作的的确确是一模一样地发生在这俩个体身上的；
Just as students need to study hard in schools, employees should try to make as high profits as possible for their companies.
just as表示的是一种方式、情况上的类比

再看一下这一句，如果你用的是like，就变成polio vaccine和mass dietarychange都is needed to protect the significant number who are susceptible to thelife-threatening effects of press eating habits；但其实前者并没有真正这么做，语义上就不对了

ayoyoyo

这个从句意上理解就不难了
A选项用just as...(so)，比较的是整个句子
B选项用like，比较的是具体的这两个事物

原句的意思是：正如polio疫苗给到每个人来保护少数人，大众饮食调整也需要（给到每个人）来保护某一部分人。这里比较的对象是概念化的（即为了保护少数人可以做大众规模的事情），而不是比较疫苗和饮食调整。

这也正是用just as做比较与用like作比较在功能上的不同之处。

lemontrees

曼哈顿
AS用于比较时，也常常与Just, so或者so too组合使用
例句：just as the trains late yesterday,the buses are late today.
        just as the trains late yesterday,so too are they late today
而且 B从句套从句  而A
just as polio vaccine is given to every person to protect the few who might actually contract polio, mass dietarychange is needed to protect the significant number who are susceptible to thelife-threatening effects of press eating habits   
Just as 后面跟的句子和主句简直完美的平行 语义也很舒服

cnrnld

试着回答一下为什么B不行的问题。

A和B都是“平行对比”，用like表示对比的两个东西是平行的，用just as表示对比的两个情况、行为、模式是平行的。

在A中要表达的是和vaccine的保护方式一样，dietary change的保护方式是什么什么样的；在B中的表达则是dietary change和vaccine一样。两个东西一样，和两个东西的使用一样、两个东西起效的模式一样，这还是不同的。

xwnh6145

关于just as... so结构中的so省略的问题，参考manhattan SC的P145的 as... so的用法：

AS ??? SO
RIGHT: AS you practice, SO shall you play. (= in the same way or manner)
JUST AS you practice, SO shall you play. (= in the same way or manner)
JUST AS you practice piano regularly, you should study regularly.
(= in the same way; the situations are analogous)
WRONG: You practice, SO shall you play.
JUST LIKE you practice, SO shall you play.

Xiaotongdi

我也记得GMAT中用like一般接比较对象，不会接举例对象！

chenqian7261

just as考察的是平行结构，没明显的错误，like后一半直接接比较的对象，但这却插入一个which，使p.v和m.d.c隔得太远，让原文变得难以理解！而且无缘故的省略actually。so prefer A