题干

接听电话时,很容易分辨出熟人的声音,这主要是根据声音的____(选填“音调”、“响度”或“音色”)来判断的;如图甲、乙所示是两种声音的波形图,从图形可知:图____是噪声的波形,图____是乐音的波形。

甲                       乙

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音色,乙,甲

同类题1

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    My nephew's 10-year-old son came for a visit one hot, July weekend. I persuaded him to 1 inside and joined him in a game. After 2 for an hour, I suggested that we relax for a while. I 3 my favorite chair to let my neck relax. He left the room and I was catching a few enjoyable4 of peace.

    “Look, Alice,” he said excitedly as he 5 over to the chair where I was sitting. “I found a kite. Could we go outside and 6 it?” Looking out of a nearby window, I noticed it was 7 outside. “I'm sorry. Tripper,” I said, sad to see his 8 expression. “The wind is not 9today. The kite won't fly.”

    The 1010-year-old boy replied, “I think it's windy enough. I can get it to fly,” he answered 11he hurried out to the back door.

    He ran back and forth, as 12as his ten-year-old legs would carry him, looking back 13 at the kite behind. After about ten minutes of unsuccessful trying, he came back in.

    I asked, “How did it 14?” “Fine,” he said, not wanting to admit (承认) the failure. “I got it to fly some.”15 I heard him say secretly, “I guess I'll have to wait for the 16

    At that moment I heard another voice speak to my17“Alice, sometimes you are just like that. You want to do it your way 18waiting for the wind.”

    And the voice was 19. We usually want to use our own efforts to 20what we want to do. We must learn how to make use of “the wind”in the first place!