og 12 RC 128 五个荷尔蒙的那道题 ~~~

debbiebeansky

Unlike the oligosaccharins, the five well-known

(15) plant hormones are pleiotropic rather than specific; that is, each has more than one effect on the growth and development of plants.The five have so many simultaneous effects thatthey are not very useful in artificially controlling the growth of

(20) crops

我把需要看的地方摘了出来，然后咱们看这道题哈：

According to the passage, the five well-known plant hormones are not useful in controlling the growth of crops because

2，each hormone has various effects on plants
3，none of the hormones can function without the others

我知道2对，但我想知道为什么3错~~~



（ps：附上自己的理由：我认为，“The five have so many simultaneous effects”，的意思就是：这五个h同时作用。那3中的意思不就是说：没有5个中的一个，就不能起作用 ~~这不是和“这五个h同时作用”一个意思吗？）  求nn指点一下我这题，膜拜了先~~~~

debbiebeansky

我补充一下我的想法，大家帮我纠正一下错误哈~~~~

The five have so many simultaneous effects thatthey are not very useful in artificially controlling the growth of

crops

我觉得这里有so 。。。that

那么也就是说，后面的效果是由于前面的问题导致的~
那么原因自然就应该“simultaneous effects ”的我以为~
求指点~~~~

debbiebeansky

谢谢楼上两位，明白了。