题型:阅读理解 题类:常考题 难易度:普通
山西忻州一中2015-2016学年高一下学期期末考试英语试卷
There are two main types of nonverbal communication. Body language is the first. Body language is body movements that depend on a person's attitude or feelings. Body language includes the way people walk,how they stand,and their facial features. In other words,any kind of meaning is shown by a person's attitude or body movements. For example,when a boy is sad he may drop his head and walk slowly. Or,if a girl is happy,she might run and jump or stand up straight and put her hands in the air. People don't have to say anything to show how they feel about things. The colour of people's skin may even show how they feel. For example,if people with light coloured skin get embarrassed,their skin may turn red,or if they are worried,they might get pale. Body language can be voluntary(主动的) or involuntary(无意识的).An interesting fact is that blind children will smile when happy even though they have never seen a smile.
The next main type of nonverbal communication is gestures. Gestures are communications like facial expressions,hand signals,eye gazing,and body postures. Examples include smiles,handshakes,waving,and raising certain fingers to say something. For instance,if you saw a friend at a noisy carnival,you might smile and wave at your friend. You might also point at the Ferris wheel if you wanted to meet your friend there. You could do all of these things without saying a word. Another great example is in baseball when the catcher signals to the pitcher the kind of pitch to use for the batter that is up.
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Hot Air Balloons
| A hot air balloon is made up of 3 main parts:
The Envelope The actual fabric balloon which holds the air.
The Burner The unit which pushes the heat up into the envelope
The Basket Where the passengers and pilot stand |
The basis of how the balloon works is that warmer air rises in cooler air. This is because hot air is lighter than cool air as it has less mass per unit of volume. Mass can be defined by the measure of how much matter something contains. The actual balloon has to be large as it takes a large amount of heated air to lift it off the ground.
The burner uses propane gas to heat up the air in the envelope to move the balloon off the ground and into the air. The pilot must keep firing the burner at regular intervals throughout the flight to ensure that the balloon continues to the stable. Naturally, the hot air will not escape from the hot at the very bottom of the envelop as firstly, hot air rises and secondly, the floating power keeps it moving up.
To move the balloon upwards, the pilot opens up the propane value which lets the propane flow to the burner which in turn frees the flame up into the envelope. It works in much the same way as a gas grill: the more you open the valve, the bigger the flame to beat the air and the faster the balloon rises.
The “Parachute Valve” at the very top of the balloon is what is used to bring the balloon down towards the ground. It is a circle of fabric cut out of the top of the envelop which is controlled by a rope which runs down through the middle of the envelope to the basket. If the pilot wants to bring the balloon down, he or she simply pulls on the rope which will open the valve, letting hot air escape, decreasing the inner air temperature. This cooling of air causes the balloon to slow its rise.
The pilot can operate horizontally by changing the vertical position of the balloon because the wind blows in different directions at different altitudes. If the pilot wants to move in a particular direction, he or she simply arises and falls to the appropriate level and rides with the wind.
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