03-10-19/37

dct

1.Babies (have) soft spots (between) the bones (of) their skulls, which (allowing) for further growth.

我知道allowing应该改为allow，但是of不需要改为and吗？

2.(The element) potassium (makes up) (less) than one half (percentage) of the human body.

请问percentage为什么错了，它不是既可以当作可数，也可以当作不可数名词来用吗？

gre3333

1.bones 和skulls 不是并列的。between the bones of their skulls意思是：在每两块颅骨之间

2. d --> percent     percent百分数；percentage百分比

consonant

1,between the bones, not between the bones and the skulls.

That' why I always emphasize that you should finish reading all the 4 options.

2,hope u can extract some from your dictionary about the usage of "percentage"

dct

唉，我的知识的确很贫乏，而且有时候极度缺乏耐心sigh~~~

谢谢gre3333MM的热心帮助，也谢谢consonantGG的好心提醒！！！