题目

已知y -2与x成正比，且当x=1时，y= -6， (1)求y与x之间的函数关系式           (2)若点(a，2)在这个函数图象上，求a的值 答案：What’s that smell? Do you hear that noise? Taste this! Look at me! Feel this, isn’t it soft? When you hear, or even use these phrases, you probably don’t stop to think about why we use them. Well, it’s because of our senses. Without us even knowing, our sense organs (nose, eyes, ears, tongue, and skin) are taking in information and sending it to the brain for processing. If we didn’t have them, we would not be able to smell, see, hear, taste, or touch anything! Senses are the physical means by which all living things see, hear, smell, taste, and touch. Each sense collects information about the world and detects changes within the body. Both people and animals get all of their knowledge from their senses, and that is why senses are so important. All senses depend on the working nerve system. Our sense organs start to work when something stimulates（刺激） special nerve cells, called receptors, in a sense organ. Once stimulated, the receptors send nerve impulses along sensory nerves to the brain. Your brain then tells you what to do. For example, your sound receptors are often attacked by billions of sound waves. When these signals reach the part of the brain called the cerebral cortex（大脑皮层）, we become conscious of the sounds. Our group really learned a lot about the senses while creating this website. We hope that you are able to get just as much out of it. Please feel free to comment about anything on the site by e-mailing us. Also, don’t forget to sign the guest book! Thanks for visiting our site. Come back soon!60. This article is most probably taken from a _____.A. newspaper                B. magazine                      C. website                      D. novel61. Senses are very important because _____.A. both people and animals get all of their knowledge from themB. they are used to communicate with othersC. they can prevent the organs from being attackedD. they can tell you what the stimulus is62. Which of the following tells you what stimulate you?A. The nerve cell.         B. The receptor.             C. The nerve impulse.   D. The brain.63. According to this article, the following are all functions of the senses, EXCEPT _____.A. collecting information about the world  B. detecting changes within the bodyC. sending nerve impulses to the brain D. serving the brain when needed