本课配套习题挑战模式1/5
单选题
难度系数:
1.下面不是声源的是( )
A: 蝙蝠正在觅食 |
B: 静静悬挂在床头的吉他 |
C: 秋风中正在簌簌发抖的树叶 |
D: 正在挥舞的手臂 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWjsOmfs+aYr+eUseeJqeS9k+eahOaMr+WKqOS6p+eUn+eahO+8jOiDveWkn+WPkeWjsOeahOeJqeS9k+WPq+WBmuWjsOa6kA==
- 提示2:IOS6uuiAs+iDveWkn+WQrOWIsOeahOWjsOmfs+eahOmikeeOh+iMg+WbtOaYrzIwSHrvvZ4yMDAwMEh677yM5LiN5Zyo6L+Z5Liq6IyD5Zu05YaF55qE5aOw6Z+z5Lq66ICz5ZCs5LiN5YiwLg==
- 答案:Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.正在发声的物体是声源,关于声源,下列说法正确的是( )
A: 声源只能是固体 |
B: 声源只能是液体 |
C: 声源只能是固体和气体 |
D: 固体、液体、气体都能成为声源 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWjsOmfs+aYr+eUseeJqeS9k+aMr+WKqOS6p+eUn+eahO+8jOacrOi6q+iDveWPkeWjsOeahOeJqeS9k+ensOS4uuWjsOa6kC4=
- 答案:RA==
5Lq66IO95Y+R5Ye65aOw6Z+z5piv55Sx5LqO5aOw5bim5oyv5Yqo5Lqn55Sf55qE77yb5rWB5rC05Y+R5Ye655qE5ZOX5ZOX5aOw77yM5piv55Sx5LqO5rC055qE5oyv5Yqo5Y+R5Ye655qE77yM56yb5a2Q5Y+R5aOw77yM5piv55Sx5LqO56m65rCU5oyv5Yqo5Lqn55Sf55qELiA8YnI+5Y+v6KeB77yM5Zu65L2T44CB5ray5L2T5ZKM5rCU5L2T6YO96IO95Y+R5aOw77yM6YO95Y+v5Lul5L2c5Li65aOw5rqQLiA=
本课配套习题挑战模式3/5
单选题
难度系数:
3.下列有关声源的说法正确的是( )
A: 空气不可能成为声源 |
B: 水不可能成为声源 |
C: 石头不可能成为声源 |
D: 以上三者都可以成为声源 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWjsOmfs+aYr+eUseeJqeS9k+aMr+WKqOS6p+eUn+eahO+8jOawlOS9k+OAgea2suS9k+WSjOWbuuS9k+aMr+WKqOmDveWPr+S7peS6p+eUn+WjsOmfsy4=
- 答案:RA==
5qC55o2u5aOw6Z+z5piv55Sx54mp5L2T5oyv5Yqo5Lqn55Sf55qE77yM5rCU5L2T44CB5ray5L2T5ZKM5Zu65L2T5oyv5Yqo6YO95Y+v5Lul5Lqn55Sf5aOw6Z+z77yM5omA5Lul56m65rCU44CB5rC05ZKM55+z5aS06YO95Y+v5Lul5oiQ5Li65aOw5rqQLiA8YnI+5pWF6YCJRC4g
本课配套习题挑战模式4/5
单选题
难度系数:
4.下列事件中不属于声源的是( )
A: 挥动的手臂 |
B: 挂在胸前的哨子 |
C: 在夜里飞行的蝙蝠 |
D: 被鼓椎敲击的鼓面 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOiDveWkn+WPkeWjsOeahOeJqeS9k+S4jeaYr+WjsOa6kO+8jOato+WcqOWPkeWjsOeahOeJqeS9k+aJjeaYr+WjsOa6kO+8jOWIhuaekOmimOW5suS4rea2ieWPiueahOeJqeS9k++8jOaYr+ato+WcqOWPkeWjsOeahOWwseaYr+WjsOa6kC4=
- 答案:Qg==
5q2j5Zyo5Y+R5aOw55qE54mp5L2T5Y+r5aOw5rqQLiA8YnI+QeOAgeaMpeWKqOeahOaJi+iHgu+8jOato+WcqOaMr+WKqOS4lOWPkeWjsO+8jOaYr+WjsOa6kO+8m+aVhUHkuI3nrKblkIjpopjmhI/vvJs8YnI+QuOAgeaMguWcqOiDuOWJjeeahOWTqOWtkO+8jOayoeacieWPkeWjsO+8jOaVheS4jeaYr+WjsOa6kO+8mzxicj5D44CB5Zyo5aSc6YeM6aOe6KGM55qE6J2Z6J2g77yM57+F6IaA5oyv5Yqo5q2j5Zyo5Y+R5Ye65aOw6Z+z77yM5piv5aOw5rqQ77ybPGJyPkTjgIHooqvpvJPmpI7mlbLlh7vnmoTpvJPpnaLvvIzpvJPpnaLmraPlnKjmjK/liqjkuJTlj5Hlo7DvvIzmmK/lo7DmupAuIDxicj7mlYXpgIlCLiA=
本课配套习题挑战模式5/5
多选题
难度系数:
5.
以下正在发声的乐器中,关于它们的声源判断正确的是( )
A: 架子鼓的声源是乐器本身 |
B: 笛子的声源的空气柱 |
C: 大提琴的声源是琴弦 |
D: 小提琴的声源是琴里面空气 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5omT5Ye75LmQ55qE5aOw5rqQ5piv5LmQ5Zmo5pys6LqrPC9wPg==
- 提示2:PHA+566h5bym5LmQ55qE5aOw5rqQ5piv56m65rCU5p+xPC9wPg==
- 提示3:PHA+5bym5LmQ55qE5aOw5rqQ5piv55C05bymPC9wPg==
- 答案:QSxCLEM=
PHA+QS7miZPlh7vkuZDnmoTlo7DmupDmmK/kuZDlmajmnKzouqvvvIzliJlB5q2j56Gu77ybQi7nrqHlvKbkuZDnmoTlo7DmupDmmK/nqbrmsJTmn7HvvIxC6YCJ6aG55q2j56Gu77ybQy7lvKbkuZDnmoTlo7DmupDmmK/nkLTlvKbvvIxD6YCJ6aG55q2j56Gu77yMROmAiemhuemUmeivr+OAgjwvcD4=