Forces must exist between the object(物体) and the incline(斜面) that prevent the object from sliding.
举一反三
- In the following conclusions, ( ) is wrong. A: If the object displaces, it must deform at the same time. B: If there is no displacement at each point of the object, there must be no deformation. C: If the object deforms, there are always some points in the object to displace. D: The magnitude of the displacement depends on the deformation and constraint of the object.
- “Comparison and contrast” is used to compare the dissimilar and contrast the similar between things, sometimes object by object, sometimes point by point.
- The same object must have same names in different languages.
- API函数（ ）用于删除本地文件。 A: wx.saveFile(Object object) B: wx.removeSavedFile(Object object) C: wx.getSavedFileInfo(Object object) D: wx.getSavedFileList(Object object)
- 隐藏loading 提示框的API函数是（ ）。 A: wx.hideLoading(Object object) B: wx.showLoading(Object object) C: wx.hideToast(Object object) D: wx.showModal(Object object)