1/5单选题
难度：
1.
如图所示，杠杆在水平位置处于平衡状态，杠杆上每格均匀等距，每个都相同. 下列四项操作中，会使杠杆右端下倾的是（ ）
①将杠杆两侧的钩码同时各向外移动一小格
②将杠杆两侧的钩码同时各向内移动一小格
③在杠杆的两侧同时各减掉一个钩码
④在杠杆的两侧钩码下同时各加挂一个相同的钩码.
| A | ②③ |
| B | ②④ |
| C | ①③ |
| D | ①④ |
正确答案：Qw==
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
