问题 填空题 案例分析题

下图是人体缩手反射的反射弧结构,方框甲、乙代表神经中枢,微型电流计F的两电极均与神经纤维的外侧接触。回答下列有关问题:

 

该反射弧中的感受器是()(填图中字母),其产生的兴奋在传入神经纤维上以()形式进行传导。当神经冲动传到神经末梢时,引起突触前膜内()释放神经递质,该递质与突触后膜上()结合,使下一神经元兴奋。

答案

参考答案:A;局部电流(或电信号,神经冲动);突触小泡;(特异性)受体

解析:根据甲或乙处的突触结构可判断A为感受器,E是效应器。感受器接受刺激后产生兴奋,兴奋在神经纤维上以局部电流(或电信号,神经冲动)的形式进行传导。兴奋在神经元之间通过突触传递,当神经冲动传到神经末梢时,引起突触前膜内突触小泡释放神经递质,该递质与突触后膜上特异性受体结合,使下一神经元兴奋。

完形填空

My version(视力) is getting worse. I can’t even see what is five feet away from me without glasses. ①我拒绝戴眼镜,though I know I need to. I’m afraid they will make me look ugly. Besides, I can do well without them. These were my thoughts two years ago, when I was in the sixth grade. An embarrassing experience taught me that what I was thinking was wrong.

School has been out for two months. I was going to junior high school soon, where I was sure that looks are everything. So the question still remained there. Should I, Or should I not, wear glasses? The question was still in my mind when my family and I attended a wedding(婚礼) late in the summer.

During the wedding, I drank too much juice. Soon after it ended, I walked quickly to the bathroom. Since it was an emergency(紧急) and I couldn’t clearly see which door was ③marked boys. I just opened the nearest door and entered the restroom.

Unluckily, I had entered the wrong restroom. But I didn’t know this until I heard a scream(尖叫声) coming from the entrance when I was washing my hands .

After that, I decided to wear the ugly-looking glasses. I didn’t really ④care about what people thought of me any more, because I never wanted to enter the wrong bathroom again.

On the first day of seventh grade, ⑤my friends didnt make fun of me. Instead they gave me compliments. They thought the glasses made me look more cute and more natural.

So if you know something is right, just do it. ⑥It doesnt matter what others think of you. All that matters is what you think of yourself—and that you can see where you are going!

小题1: (A) 试写出文中③处划线部分mark的汉语意思:              .

(B)用一个适当的英语单词替代文中④处划线部分care about:              .

小题2:根据文中①处的汉语提示,用英语将句子补充完整:                        .

小题3:写出文中②处划线部分的同义句:School _____  _____ two months ago.

小题4:将文中⑤处划线部分合并成一句:

My friends gave me compliments _____  _____  _____ fun of me.

小题5:将文中⑥处的划线部分翻译成汉语:                                    .

单项选择题