Lying under the skull, the human brain contains an average of ten billion nerve cells called ______.
A、nervefibersC
人的大脑位于头盖骨之下，平均包括100亿个被称为神经元的神经细胞。每个神经元至少和一千到一万个其他的神经元相联系。这些神经参与着数不胜数的微电路性质的活动。这些活动使得感知、思维、交流及其他类型的智力活动成为可能。
It is not decided ________ the conference will be held.
There is a growing body of evidence to support the fact that most people suffer from a lack of daydreaming _______ an excess of it.
Itisnotdecided________theconferencewillbeheld.
The volunteers would rather go by train than ________.
We________goouttorestaurants,butmostlyweeatathome.
