题干
The train CRH380A, ___ trial operation on the Shanghai-Hangzhou high-speed railway, set a speed record of 416．6 kilometers per hour．
A：started
B：to start
C：starting
D：being started
答案(点此获取答案解析）
C
，乙队获胜的概率为 
，且每局比赛的胜负是相互独立的，问：