问题
问答题
邻居张爷爷的耳朵听不见声音，医院检查结果是，耳的各部分结构没有问题。明明百思不得其解，既然耳朵本身没有问题，怎么就会听不见声音了呢？根据本节你掌握的知识，你能解释一下为什么吗？
答案
因为听觉的形成不是在耳内形成的，要最终在大脑的听觉中枢形成，张爷爷可能是听神经或者是听觉中枢出现了病变，所以听不见声音。
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邻居张爷爷的耳朵听不见声音，医院检查结果是，耳的各部分结构没有问题。明明百思不得其解，既然耳朵本身没有问题，怎么就会听不见声音了呢？根据本节你掌握的知识，你能解释一下为什么吗？
因为听觉的形成不是在耳内形成的，要最终在大脑的听觉中枢形成，张爷爷可能是听神经或者是听觉中枢出现了病变，所以听不见声音。
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| My father enjoys bike riding. Ever since I was little, I've always loved going biking with my dad. 1 , as I became a teenager, other things began to draw my 2 . It was important to do things with friends 3 . I saw my dad every evening at home. Why did I have to 4 my Sundays to all-day bike trips with him, too? If my indifference (冷漠) hurt him, my father kept 5 , but he would always let me know when he was planning a bike trip 6 I wanted to come. It was a Sunday morning, and I was in low 7 .Two of my friends had gone to the movies without inviting me. Just then my father 8 my room. "It's a beautiful day. Want to go for a 9 today, Beck?" "Leave me alone!" I impatiently 10 .Those were the last words I said to him before he left the house that 11 . Several hours later, the police called us, 12 us that Dad had a traffic accident. My father's injuries were serious. It took several days before he could 13 speak. Beside his bed I held his hand gently, 14 of hurting him. "Daddy … I'm sorry …" "It's OK, sweetheart. I'll be OK." "No," I said, "I 15 what I said to you that day. You know, that morning?" "Sweetheart, I don't 16 anything about that day, not before, during or after the accident. I remember kissing you goodnight the night before, though." He 17 a weak smile. I felt regretful for my thoughtless remark, for I 18 wanted him to leave me alone. My teacher once told me that 19 have immeasurable power. They can hurt or they can heal. And we all have the 20 to choose our words. I intend to do that very carefully from now on. | ||||
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