题目

神经调节的基础是反射，下列与反射有关的叙述正确的是（ ）A.一个完整的反射活动至少需要3个神经元完成B.效应器的结构受到损伤会影响反射活动的完成C.刺激以电信号的形式在整个反射弧中进行传导D.同一反射弧中感受器的兴奋与效应器的反应可同时发生 答案：【答案】B【解析】1.反射的结构基础是反射弧，反射弧包括：感受器、传入神经、神经中枢、传出神经和效应器。2.完成一个反射活动的条件是：具备完整的反射弧，提供一定强度的刺激。3.兴奋在神经元之间的传递依靠突触结构实现，突触包含突触前膜、突触间隙、突触后膜。A、一个完整的反射活动根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。 Maybe you are an average student. You probably think you will never be a top student. This is not necessarily so, however. __1___. Here’s how: 1）. Plan your time carefully. When you plan your week, you should make a list of things that you have to do. After making this list, you should make a schedule of your time. First your time for eating, sleeping, dressing, etc. then decide a good, regular time for studying. __2___. A weekly schedule may not solve all your problems, but it will force you to be aware of what is happening to your time. 2）. __3___. Look around the house for a good study area. Keep this space, which may be a desk or simply a corner of your room, free of everything but study materials. No games, radios, or television! When you sit down to study, concentrate on the subject. 3）. Make good use of your time in class. Take advantage of class time to listen to everything the teachers say. Really listening in class means less work later. Take notes if necessary, because the notes will help you remember what the teacher says and study better. 4）. Study regularly. When you get home from school, go over your notes. Review the important points that your teacher mentioned in class. If you know what your teacher is going to discuss the next day, reading that material. This will help you understand the next class.__4___. 5）. Develop a good attitude towards tests. __5____. They help you remember your new knowledge. The world won’t end if you don’t pass a test, so don’t be overly worried. There are other methods that might help you with your study. You will probably discover many others after you have tried these. A．If you do these things regularly, the material will become more meaningful and you will remember it longer. B．And still it doesn’t end. C．Anyone can become a better student if he or she wants to. D．The purpose of a test is to show what you have learned about a subject. E. Don’t forget to set aside enough time for entertainment. F. Find a good place to study. G. Remember to put your books in order before leaving the room.