【判断题】209HS转向架摇枕吊由40Cr制成,调质处理,加工后进行电磁探伤。( )
【单选题】WHY DOES HTTP USE TCP AS THE TRANSPORT LAYER PROTOCOL?
A.
because transmission errors can be tolerated easily
B.
to ensure the fastest possible download speed
C.
because HTTP requires reliable delivery
D.
because HTTP is a best-effort protocol
【判断题】HTTP is the application layer protocol?
【判断题】由于数控车床具有直线和圆弧插补功能,所以可以车削任意直线和曲线组成的形状复杂的回转体零件
【判断题】HTTP protocol only contains one framing technique.
【单选题】采用手工电弧焊方法焊接重要的焊接结构时,通常选用碱性焊条,原因是 ( ) 。
【判断题】HTTP is mainly a push protocol and SMTP is mainly a pull protocol