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【单选题】
听力原文：W：You look upset．Anything wrong? M：I failed in the physics exam again in spite of all the efforts I made． Q：What do we know about the man from the conversation? (15)A.
He didn't work as hard as he was supposed to.
B.
He didn't pass the physics exam.
C.
He did better in an earlier exam.
D.
He found something wrong with the exam.
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反馈参考答案：
举一反三
【简答题】There are three components needed for ignition and combustion to occur: fuel, air and ______.
【简答题】变压器接电源的绕组称为( )。
【单选题】The ability of a fuel particle to travel into the combustion chamber before burning is called _____.
A.
penetration
B.
permanence
C.
turbulence
D.
atomization
【简答题】变压器接电源的绕组称为( ),接负载的绕组称为( )。
【单选题】Fuel is injected into the combustion space by ( )
A.
a cooling system
B.
a lubricating system
C.
an injection system
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