已知a>b,且c为正数,那么在下列代数式中正确的是( )。
A.a>b+c
B.ac>bc
C.a>c
D.b>c
参考答案:B
Selig formally announced on Thursday his intention to retire in January 2015. “It remains my great______to serve the game I have loved throughout my life.” he said.
A.contribution
B.pattern
C.competition
D.privilege
常见的多路传输技术有()。
A.分时多路传输
B.分时多路复用
C.频分复用
D.码分复用