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。
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
Itisnotdecided________theconferencewillbeheld.
The reply, when it finally came, was ________ the negative.
Hetalkedalotaboutthingsandpersons________theyrememberedintheschool.
Younger children are curious ________ how things work ，and many of them want to take apart everything within their reach.
