说明怠速装置是在什么样的情况下工作的？它的构造和工作原理如何？
参考答案：
怠速装置是在怠速和很小负荷的情况下工作的！它主要是由怠速喷口，怠速调整螺钉，怠速过渡孔，怠速空气量孔，怠速油道和怠速量孔组成。发动机怠速时，在怠速喷口真空度的作用下，浮子室中的汽油经主量孔和怠速量孔，流入怠速油道，与从怠速空气量孔进入的空气混合成泡沫状的油液自怠速喷口喷出。
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| Earthquakes are 1 ; thousands of them happen each day. But most are too weak to feel. During a big earthquake. there is often a great noise first. Then the earth 2 terribly; many houses fall down. Railway tracks break and trains go 3 lines; a great many factories are 4 ; thousands of deaths are caused, and many more lose homes... 5 the great damage and deaths caused by the earthquake itself, other disasters such as fires often 6 . More buildings are destroyed and more 7 are caused. It is well known of the 8 of a possible earthquake, and for centuries man has been making researches on earthquakes. More than 2,000 years ago, 9 , a Chinese scientist named Zhang Heng invented a machine which could find out from which 10 the seismic (地震的) waves had come, and this machine is still 11 by scientists today. Now we know much more about earthquakes and 12 they happen, but we still cannot tell exactly when and where an earthquake will happen, and cannot 13 it from happening. So earthquakes are among the 14 disasters in the world. No one can stop natural earthquakes. 15 , scientists can help stop earthquakes destroying whole cities and causing too many deaths. | ||||
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