给划横线的字注音。

把分式 $\frac{3x}{x+y}$ 中的x，y都扩大两倍，那么分式的值（     ）

小伟在“用电流表、电压表测电阻”的实验中，所用电源电压为3伏且不变．他正确连接电路，实验步骤正确．闭合开关后，在表格中记录了电流表的示数，此时电压表指针如图（a）所示，我们可以根据____ 判断此时电压值为1.2伏；接着该同学移动滑动变阻器的滑片P到某位置，电压表示数为1.6伏，电流表示数如图（b）所示；当把滑动变阻器的滑片移到某端点时，电流表示数为0.48A．请将下表填写完整．（计算电阻时，精确到0.1欧）

用某锅炉把50kg的水从20℃加热到100℃．水的比热容是4.2×10³J/（kg•℃）．试求：

根据短文内容从方框中选词并用其适当形式填空，使短文完整、通顺

agree, deep, especial, good, hold,

listen, make, personal, reason, wonder

    At a concert, a girl is looking up with tears and ____ her arms up in the air. You may ____ what is wrong with her. I can tell you the reason: She is ____ moved by the music.

    Music can move you by the lyrics, the beat or the rhythm (节奏). Lyrics are sometimes the ____ part of a song. But my favorite parts of a song are the beat and the rhythm. ____ , I love the good guitar melody (旋律).

    Would you like to know why songs ____ you feel so great inside? Well, I would personally say that lyrics are a key ____ . You probably ____ with the ideas of the lyrics in your favorite songs. You feel great just because your ____ ideas and thoughts are in the songs! So, the next time you ____ to a song, see whether the song touches (触动) you by the lyrics.