- 搜標題
- 搜題干
- 搜選項
單項選擇題
調度自動化主站系統(tǒng)年可用率（）
A.≧99.78%
B.≧99.88%
C.≧99.98%
D.＞99.98%
A.≧99.78%
B.≧99.88%
C.≧99.98%
D.＞99.98%
