题目内容
阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑．
The temperature of your body should be always just the same, no matter the weather is hot or cold. That is why the doctor uses his thermometer(温度计)when you are sick. When you are well. you temperature is ninety-eight and six tenths degrees. If he finds it higher than that, it is a sure sign that something is wrong.
The body keeps the same temperature all the time, because it balances the heat it produces and it gives off. It is always burning up food and producing heat. It call produce heat faster when it needs to or give off heat faster when it becomes too warm. Let's see how this happens.
The heat of your body is given off chiefly through the skin. When you are cold, your skin is tight and shows“goose flesh”. When you get chilly every cold, you must dance around to keep warm or else you will shiver(颤抖). Then your muscles begin to work, burn up fuel(燃料), and produce more heat. It is not pleasant to shiver, so you usually prefer warming up by exercise, or put on more clothes to keep heat in.
When you are warm, the skin is loose and soft. It is so supplied with blood that heat is given off rapidly. If you get too warm, you begin to sweat, and more body heat is used in evaporating(蒸发)the moisture(潮湿)from your skin. You wear less clothing, too, in warm weather or warm room, so that warm can be given off freely. You feel less like exercising because your body is warm already, and the extra heat produced by exercise makes you uncomfortable.
You can see from this why you feel differently in different kinds of weather. In summer, when it is warm, you feel tired and lazy. You do not care to work or play, but enjoy lying and doing nothing. When you get out of doors in winter, the cold air makes you feel lively. You want to run and play.
1．The doctor will take his temperature when one gets sick because ________.
[ ]
A．one's temperature is always the same no matter whether he is sick or not
B．one's temperature is a sign which can show whether he is sick or not
C．when one is ill his temperature is sure to be higher than normal
D．one's temperature will be sure to change if something is wrong with him
2．The body keeps the same temperature all the time by ________.
[ ]
A．balancing the heat it gets and it loses
B．producing heat from food
C．giving off the heat produced in it
D．stopping producing heat when it needs
3．When one gets very cold, which of the following will not happen to him?
[ ]
A．His skin will become tight in order to keep warm.
B．He can exercise to make his muscle produce more heat.
C．He can put on more clothes to keep warm.
D．He will be certainly to shiver to produce more heat.
4．When one gets too warm, he begins to sweat in order to ________.
[ ]
A．evaporate the moisture
B．give off heat quickly
C．make the skin soft and loose
D．get the blood to move faster
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farmer，inventor，astronomer writer and antislavery supporter．He created the first American—built striking clock．
lt(一卷)of white cloth for his mother and looked around for someone to taik to．Benjamin’s heart jumped like a rabbit when he saw a friend holding a gold watch．Benjamin had always wanted to figure out how clocks and watches worked．The friend saw Benjamin and let him sit down for a good talk．
r two years，Benjamin farmed all day and worked on his wood pieces at night．In1753，two years after he had borrowed the watch，Benjamin put all the pieces together．Benjamin had made his own clock．