2. 外语
  3. The human brain is the most complex structure in the universe. It contains【B1】______100 billion nerve cells, each of which has t

The human brain is the most complex structure in the universe. It contains【B1】______100 billion nerve cells, each of which has t

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问题     The human brain is the most complex structure in the universe. It contains【B1】______100 billion nerve cells, each of which has thousands of connections with each other. Their【B2】______controls each of the body’s functions, allows thoughts, perceptions, memories, feelings, and also【B3】______and communication. Understanding just how the brain works, in health or in sickness, is one of the greatest【B4】______of our time. What is determined by genes, what is formed by experience ? Scientists-are【B5】______all aspects of the nervous system. Great progress can be【B6】______in visualizing and modeling brain functions, as well as in research into their biological basis. Today, it is【B7】______that 30 to 50 percent of human genes exercise their function chiefly in the brain. This gives an【B8】______of the complexity of the genetic control and development.【B9】______. Half of all genetic diseases affect the nervous system. The brain can only reach its full capability through interaction with its surroundings.【B10】______. How do nerve cell processes find their goal? How do different brain areas develop? How do perceiving functions mature? Thanks to research, the prevention and cure of many brain diseases seems possible for the first time.【B11】______.
【B2】
选项
答案interaction
解析 此处缺少名词在句子中作主语。interaction意为“相互作用，相互影响”。
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