OG12-23-128

miaomiao5973

文章中说The five have so many simultaneous effects that they are not very useful in artificially controlling the growth of crops. so...that句式不就是前面的many simultaneous effects导致了后面的结果吗？为什么128题不选C，而是选B呀，求指点。。。

rainbowmanutd

顶

mia113

lz注意看这个句子的前面有句话：
each has more than one effect on the growth and development of plants.
说明它又various effects.
C 文中没有任何关于 hormones之间的运作是需要相互依存的，只是each hormones has various effects, which occur at the same time.  所以此选项属于无中生有