C-whereas nuclear power accounts for just over 33 percent of the energy produced in Germany
D-whereas just over 33 percent of the energy comes from nuclear power in Germany
C中the energy被produced修饰，说明这个energy是来自德国的， 但是D中the energy 就赤裸裸的出现了也没有修饰，所以就默认为这个energy是指代之前提到法国的能源，这样就有歧义。
平行，前面的是书那后面的也必须是书，排除acd
且前面是Jean Toomer's Cane，(b) is not as parallel as (e), either. since the original says "jean toomer's cane", the others should also have the form "X's Y", not "Y by X".
RON：
word choice is a sticky thing. for instance, it's actually better to say "birds have a four-chambered heart" than to say "birds have four-chambered hearts", because the former makes it clear that each bird has exactly 1 heart. both, however, are acceptable.
in a similar vein, the construction of (d) and (e) makes it more clear that each book has exactly 1 author.
Were it not for意思是：如果不是的话，和instead意思重复了。所以A,B错误。同时需要注意的是前半句用到了代词it和its，所以后半句需要明确指出代词指代对象，通过代词its core这里就可以判断出its指代的是star。最后，would do 和would have done的区别在于，would do是指将来，would have done是指过去应该做什么，完全不同。
Also, we don't want to say "undergoing being converted." Like most uses of "being," this is awkward and unnecessary. In this case, we have a simple noun--"conversion"--so there's no reason not to use that.
_________________
Dmitry Farber | Manhattan GMAT Instructor | New York
"growing them naturally" is illogical.
in this construction, "them" (= fish) is the OBJECT of "growing". this implies that someone else must be growing the fish -- which doesn't make sense if we're talking about natural growth.
notice that the correct answer contains "they grow naturally", a more accurate description of what actually happens -- the fish just grow, by themselves.
定位句：If a clone loses many stems simultaneously, the resulting hormonal imbalance triggers a huge increase in new, rapidly growing shoots that can outnumber the ones destroyed.
扫描二维码，直接登录
whereas不需要平行!