本课配套习题挑战模式1/5
A: 手 |
B: 地球 |
C: 线绳 |
D: 风筝 |
- 提示1:IOmmluWFiOWPr+WIpOaWreWPl+WKm+eJqeS9k+aYr+mjjuetnQ==
- 提示2:IOe7memjjuetneeahOaLieWKm+aYr+aLtOWcqOmjjuetneS4iueahOe7hue6vw==
- 答案:Qw==
6YCa6L+H57uz5a2Q5ouJ6aOO562d77yM5LiO6aOO562d5o6l6Kem55qE5piv57uz5a2QLiDpo47nrZ3lr7nnu7PlrZDmnInkuIDkuKrlkJHkuIrnmoTmi4nlipvvvIznlLHkuo7niankvZPpl7TlipvnmoTkvZznlKjmmK/nm7jkupLnmoTvvIzlkIzml7bnu7PlrZDkuZ/kvJrlr7npo47nrZ3mnInkuIDkuKrlkJHkuIvnmoTmi4nlipsuIOaJgOS7pemjjuetneWPl+WIsOS4gOS4quWQkeS4i+eahOWKm+eahOS9nOeUqO+8jOi/meS4quWKm+eahOaWveWKm+eJqeS9k+aYr+e7s+WtkC4gPGJyPuaVhemAie+8mkMuIA==
本课配套习题挑战模式2/5
用钓鱼竿拉出水中的鱼时,对鱼施力的物体是( )
A: 手握鱼竿的人 |
B: 拉住鱼的鱼钩 |
C: 钓竿 |
D: 鱼 |
- 提示1:PHA+6aaW5YWI5Yik5pat5Y+X5Yqb54mp5L2T5piv6bG8PC9wPg==
- 提示2:PHA+6bG85Y+X5Yiw6bG86ZKp57uZ5a6D5ZCR5LiK55qE5ouJ5YqbPC9wPg==
- 提示3:PHA+5omA5Lul5pa95Yqb54mp5L2T5bqU6K+l5piv6bG86ZKpPC9wPg==
- 答案:Qg==
PHA+5Zyo5ouJ5Ye65rC05Lit55qE6bG855qE6L+H56iL5Lit77yM5LiO6bG855u45LqS5L2c55So55qE5Y+q5pyJ6bG86ZKp77yM5pWF5pa95Yqb55qE54mp5L2T5bqU6K+l5piv5ouJ5L2P6bG855qE6bG86ZKpLjxicj7mlYXpgIlCLjxicj48L3A+
本课配套习题挑战模式3/5
A: 船 |
B: 船桨 |
C: 湖水 |
D: 河岸 |
- 提示1:IOWPl+WKm+eJqeS9k+aYr+iIuQ==
- 提示2:IOiIueWcqOWIkuihjOeahOi/h+eoi+S4reWPl+WIsOawtOe7meWug+WQkeWJjeeahOWKmw==
- 提示3:IOaJgOS7peaWveWKm+eJqeS9k+aYr+a5luawtA==
- 答案:Qw==
5Lq65YiS6Ii55pe277yM6Ii55qGo5ZCR5ZCO57uZ5rC05ZCR5ZCO55qE5Yqb77yM5rC057uZ6Ii55qGo5LiA5ZCR5YmN55qE5Y+N5L2c55So5Yqb77yM5pWF6Ii55YmN6KGM5Yqb55qE5pa95Yqb54mp5L2T5piv5rmW5rC0LiA8YnI+5pWF6YCJQy4g
本课配套习题挑战模式4/5
A: 天花板,绳子 |
B: 绳子,地球 |
C: 天花板,地球 |
D: 绳子,地面 |
- 提示1:IOeJqeS9k0Hlj5fliLDkuKTkuKrlipvnmoTkvZznlKg=
- 提示2:IOS4gOS4quaYr+e7s+WtkOeahOaLieWKm++8jOaWveWKm+eJqeS9k+aYr+e7s+WtkA==
- 提示3:IOS4gOS4quaYr+eJqeS9k+eahOmHjeWKm++8jOaWveWKm+eJqeS9k+aYr+WcsOeQgw==
- 答案:Qg==
54mp5L2TQeWPl+erluebtOWQkeS4i+eahOmHjeWKm0flkoznq5bnm7TlkJHkuIrnmoTnu7PlrZDnmoTmi4nliptGLiDph43liptH55qE5pa95Yqb54mp5L2T5piv5Zyw55CD77yM5ouJ5YqbRueahOaWveWKm+eJqeS9k+aYr+e7s+WtkC4gPGJyPuaVhemAiUIuIA==
本课配套习题挑战模式5/5
以下关于施力物体和受力物体的说法正确的是( )
①桌面对书的支持力,施力物体是桌面,受力物体是书
②书对桌面的压力,施力物体是桌面,受力物体是书
③桌面受到书的压力,施力物体是书,受力物体是桌面
④书受到桌面的支持力,施力物体是书,受力物体是桌面
A: ①② |
B: ①③ |
C: ②③ |
D: ②④ |
- 提示1:PHA+5YWI56Gu5a6a5Y+X5Yqb54mp5L2TPC9wPg==
- 提示2:PHA+54S25ZCO5Yik5pat6L+Z5Liq54mp5L2T5Y+X5Yiw5LuA5LmI5YqbPC9wPg==
- 提示3:PHA+5pyA5ZCO5Yik5pat6L+Z5Liq5Yqb5piv6LCB57uZ55qEPC9wPg==
- 答案:Qg==
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