料位开关有哪些？

任务型阅读 根据所读内容在文章后表格中的空格里填入一个最恰当的单词。（共10小题，每小题1分，计10分）
注意：每个空格只填1个单词。请将答案写在答题卡相应题号的横线上。
Many people think a telephone is a necessity. But I think it is a pest (有害的事物) and a time waste. Very often you find it impossible to escape from it. If you have a telephone in your own house, you will admit that it tends to ring when you least want it to ring; when you are asleep, or in the middle of a meal or a conversation or when you are just going out, or when you are in your bath. Are you strong-minded enough to ignore it? You are not. You think there may be some important news or message for you. I can assure you that if a message is really important it will reach you sooner or later. Have you ever rushed crippling from the bath, or chewing from the table, or dazed from the bed, only to be told that you are a wrong number?
But you will say, you need not have your name printed in the telephone directory, and you can have a telephone which is only usable for outgoing calls. Besides, you will say, isn’t it important to have a telephone in case of sudden emergency—illness, accident, or fire? Of course, you are right, but here in a thickly populated country like England one is seldom far from a telephone in case of dreadful necessity.
I think perhaps I had better try to justify (证明是有理的) myself by trying to prove that what I like is good. I admit that in different circumstances—if I were a wealthy and powerful businessperson, for instance, or badly ill and had to lie in bed, I might find a telephone a necessity. But then if I were a taxi-driver I should find a car as necessity. Let me put it another way: there are two things for which the English seem to show particular talent: one is mechanical invention, the other literature. My own business happens to be with the use of words but I see I must now stop using them, for I have had just been handed a slip of paper to say that somebody is waiting to speak to me on the telephone. I think I had better answer it. After all, one never knows, it may be something important.