举一反三
- 如图2所示，一辆小车在过山车的轨道上滑下。当小车越过图中所示位置时，小车沿运动方向的速度和加速度将怎样变化？（）<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6c30e8ff9bf94299adc707e6e03775fe.png" /> A: 速度增加，加速度减小 B: 两者都减小 C: 速度减小，但是加速度增加 D: 都保持不变
- 如图2所示，一辆小车在过山车的轨道上滑下。当小车越过图中所示位置时，小车沿运动方向的速度和加速度将怎样变化？（）[img=265x208]17a3dced52fc78b.png[/img]
- 如图2所示，一辆小车在过山车的轨道上滑下。当小车越过图中所示位置时，小车沿运动方向的速度和加速度将怎样变化？（）[img=265x208]178697330237721.png[/img] A: 都增加 B: 速度增加，加速度减小 C: 两者都减小 D: 都保持不变 E: 速度减小，但是加速度增加
- 图中两直线的位置关系为平行的是 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/af01922f16524a0d83816bd1b3ecfcf1.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/9bb43005a3d34c66a0111917d18d7a38.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/72d094dad49f48e9b3e1d2d81ff3b557.png">
- 设A=<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/bc546fc03fdb4ba3b7e6b144b6371d7f.png" />，B=Р(Р(A)) 下列（ ）表达式不成立。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6e615703da60435893f9e9a9273e12e5.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/64c831067d054e71a6c76f43849d450d.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/72023a5250e44c12b98923044194f13d.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/c48e039a739c4502830eee7ae0ac1678.png" />
内容
- 0
下面几组视图中，哪一组表达的是同轴回转体？ A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/f38b9dc86817474f89c361adbade2453.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/9ee5487a88b743c8ba87d37c3edbc970.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/681d45a20e174489b062a5dc1fa47c40.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/1823f8126a5641a2b71fdb3beae9581d.png" />
- 1
已知主视图和俯视图，下面左视图画法正确的有（ ）<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/2bcab5bbb4024d99b27781c7c286d861.png" /> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/c740df10c8d64a5c9f269c0808cfba30.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/d19031d8c17543f699d8827fa6ac1249.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/1780a38439af44618170b420943a6b6d.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/8b29c3cc4c2e4f3e919c5f22d4ac96f1.png" />
- 2
已知主视图和俯视图，下面左视图画法正确的有（ ）<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/0e67a6814bf3453d8a2560ad2803175b.png" /> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/9cbbab2efe124ef98699ab70b405efa7.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/43768386d66b41419559fe5bf0fb308d.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/3880af04e89d468c8c94acccd953d9c7.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/d4f57df49926458fba76fe114e40f01c.png" />
- 3
关于螺纹画法,正确的是 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/9ccba4619f94435c98b9ae7570b942d9.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/4bc6e6bda3eb4599aac46a7006ed3c17.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/cbdbd84b5748432d8d69e846b62109af.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/177c1236fbdd49ee899e6f362f3211e6.png" />
- 4
下面螺纹画法正确的有（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/154170f305f9495183d6eadbbfbc7526.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/5c82cb80164d4bff91f00d2433c71f8f.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/71ba69fdd015468dbb356bb55a217725.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/c510d567fcf749eb8b38b64b08a447d8.png" />