Lying under the skull, the human brain contains an average of ten billion nerve cells called ______.
- A. nerve fibers
- B. nerves
- C. neurons
- D. cerebral cortex
正确答案： C
本题解析：
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。
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