中学生网络课堂本课配套习题挑战模式1/5
有四个实验现象：不能够说明声音产生的条件的实验（ ）
| A: 将正在发声的音叉接触水面，水面溅起水花 |
| B: 吹响笛子，手指按住不同的孔，发出不同的声音 |
| C: 吊着的大钟上固定一支细小的笔，钟敲响后，用纸在笔尖上迅速水平拖过，纸上出现弯曲的图象 |
| D: 锣发声的时候，用手按住锣面，锣声消失 |
- 提示1：PHA+5aOw6Z+z5piv55Sx54mp5L2T55qE5oyv5Yqo5Lqn55Sf55qE77yM5oyv5Yqo5YGc5q2i77yM5Y+R5aOw5YGc5q2iPGJyPjwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式2/5
关于声音的产生的说法中正确的是（ ）
| A: 只有声带不停地振动发出的才是声音 |
| B: 只要人耳听不到，即使物体在振动也不会发声 |
| C: 一切正在发声的物体都在振动 |
| D: 以上说法都不对 |
- 提示1：PHA+5aOw6Z+z5piv55Sx5LqO54mp5L2T5oyv5Yqo5Lqn55Sf55qEPC9wPg==
- 提示2：PHA+5LiA5YiH5Y+R5aOw5L2T6YO95Zyo5oyv5YqoPC9wPg==
- 答案：Qw==
PGRpdj7lo7Dpn7PmmK/nlLHkuo7niankvZPmjK/liqjkuqfnlJ/nmoTvvIzkuIDliIflj5Hlo7DkvZPpg73lnKjmjK/liqjvvIzmiYDku6XpgInpoblD5q2j56GuPC9kaXY+
本课配套习题挑战模式3/5
| A: 鼓声响起，鼓面上的豆粒随音乐起舞 |
| B: 把正在发声的音叉插入水中，水面溅起水花 |
| C: 桌边的钢尺发声时，可以看到钢尺在上下振动 |
| D: 土电话一端的同学可以清晰地听到另一端的说话声 |
- 提示1：IOWIqeeUqOaUvuWkp+azlei/m+ihjOWunumqjOivgeaYjuWjsOmfs+eahOS6p+eUnw==
- 答案：RA==
PGRpdj5B44CBQuOAgUPpg73mmK/niankvZPmjK/liqjvvIzlo7Dpn7PkuqfnlJ/vvIxE6YCJ6aG56K+05piO5Zu65L2T6IO95aSf5Lyg5pKt5aOw6Z+zPC9kaXY+
本课配套习题挑战模式4/5
下列关于声音的产生的说法正确的是（ ）
| A: 一切正在发声的物体都在振动 |
| B: 振动停止后，发声体仍在发声 |
| C: 动物发出的声音，一定是从它们的嘴巴发出来的 |
| D: 树叶在风中摆动时也可以发出声音，这是周围空气振动发出的 |
- 提示1：PHA+5LiA5YiH5Y+R5aOw5L2T6YO95Zyo5oyv5Yqo77yM5oyv5Yqo5YGc5q2i77yM5Y+R5aOw5YGc5q2iPC9wPg==
- 提示2：PHA+6J+L6J+A44CB6Jyc6JyC5piv5L6d6Z2g57+F6IaA5oyv5Yqo5Y+R5aOwPC9wPg==
- 提示3：PHA+5qCR5Y+25Zyo6aOO5Lit5pGG5Yqo5pe25Lmf5Y+v5Lul5Y+R5Ye65aOw6Z+z77yM6L+Z5piv5qCR5Y+25oyv5Yqo5Y+R5Ye655qEPC9wPg==
- 答案：QQ==
PGRpdj7kuIDliIflj5Hlo7DkvZPpg73lnKjmjK/liqjvvIzmjK/liqjlgZzmraLvvIzlj5Hlo7DlgZzmraLvvIxB6YCJ6aG55q2j56Gu77yMQumAiemhuemUmeivrzxicj48L2Rpdj48ZGl2Puifi+ifgOOAgeicnOicguaYr+S+nemdoOe/heiGgOaMr+WKqOWPkeWjsO+8jEPpgInpobnplJnor688YnI+PC9kaXY+PGRpdj7moJHlj7blnKjpo47kuK3mkYbliqjml7bkuZ/lj6/ku6Xlj5Hlh7rlo7Dpn7PvvIzov5nmmK/moJHlj7bmjK/liqjlj5Hlh7rnmoTvvIxE6YCJ6aG56ZSZ6K+vPGJyPjwvZGl2Pg==
本课配套习题挑战模式5/5
下列的实验和实例，能说明声音产生的条件的是（ ）
| A: 在鼓面上放些碎纸屑，敲鼓时可观察到纸屑在不停地跳动 |
| B: 放在真空罩里的手机当来电时，只见指示灯闪烁，听不见铃声 |
| C: 发声的音叉放入到水中，溅起水花 |
| D: 锣发声时用手按住锣，锣声就消失了 |
- 提示1：PHA+5aOw6Z+z5Lqn55Sf55qE5p2h5Lu25piv5oyv5YqoPC9wPg==
- 提示2：PHA+QumAiemhueivtOaYjuecn+epuuS4jeiDveS8oOWjsDwvcD4=
- 答案：QSxDLEQ=
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
