—How long has the film _______?
—For ten minutes. [ ]
A. began
B. been on
C. begun
答案:B
根据《长途光缆波分复用(WDM)传输系统工程设计规范》(YD/T5092—2005),80通路的WDM系统宜采用基于()波段的80通路。
A.B
B.C
C.D
D.S
I sincerely regret that I have hurt your feelings, but I didn’t do it ______.
A.technically
B.deliberately
C.constantly
D.instantly