The speaker, ____ for his speeches, was warmly received by the students.（　　

动力粘度单位M帕斯卡秒"的中文符号是( )A.帕.秒B.[帕][秒]C.帕-秒D.其他

单项选择题动力粘度单位M帕斯卡秒"的中文符号是( )

I enjoy listening to Miss. White, my English teacher, _...

单项选择题I enjoy listening to Miss. White, my English teacher, ____ I can only understand about half of what she says.（　　）

1平方米面积上均匀垂直作用于1牛顿力所形成的压强，称之为（）。A.1千克力B.1兆帕C.1牛D.1帕

单项选择题1平方米面积上均匀垂直作用于1牛顿力所形成的压强，称之为（）。