问题
填空题
家庭中许多电器都有发声的器件--扬声器，如图所示，扬声器工作时，它可以将 ____ 能转化为 ____ 能。当电流通过扬声器的线圈时，由于 ____ 的作用，从而使扬声器的线圈振动，进而带动纸盆振动发声。
答案
电；机械；磁场对电流的有力的作用
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家庭中许多电器都有发声的器件--扬声器，如图所示，扬声器工作时，它可以将 ____ 能转化为 ____ 能。当电流通过扬声器的线圈时，由于 ____ 的作用，从而使扬声器的线圈振动，进而带动纸盆振动发声。
电；机械；磁场对电流的有力的作用
| 完形填空。 Much meaning can be carried clearly, with our eyes, so it is often 1 that eyes can speak. Do you have such kind of 2 ? In a bus you may look at a stranger, but not too long And if he 3 that he is being looked at, he may feel uncomfortable. The same is in daily life. If you are looked at for more than necessary, you will look at yourself up and down, to see if there is 4 wrong with you. If nothing goes wrong, you will feel 5 towards the person who is looking at you that way. Eyes do speak, right? Looking too long at someone may seem to be impolite. But sometimes things are different. If a man looks at a woman for over l0 seconds, it may mean he wishes to attract her attention, to make her understand that he _ 6 _ her. When two people are in a conversation, the speakers will only look at the listener from time to time, 7 make sure that the listener does pay attention 8 what he or she is speaking. Lovers will enjoy looking at each other or being looked at for a long time, to show something that 9 cannot express. Clearly, eye contact should be done according to the relationship between two people and the place 10_ you stay. | ||||
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