Visual Basic中窗体文件的扩展名是 ______。
A.VBP
B.FRM
C.VBW
D.PDM
参考答案:B
解析:[评析] VB中窗体文件的扩展名为FRM,即Form。
The social separation among whites and blacks in the south was so great that it was not easy to establish ordinary personal relations across such a barrier.
在下列选项中,不违反安全操作规程的是()。
A.不按标准工艺生产
B.自己制订生产工艺
C.使用不熟悉的机床和工具
D.执行国家劳动保护政策