I ____ a poem last night. [ ]
A. wrote
B. writes
C. writing
答案:A
根据如图自编一道计算题并给出标准答案.[C-12Cl-35.5Ca-40O-16H-1](原来总是老师出题考我,现在我也当一回老师,并能做出标准答案^_^)
列车调度电话只准接入哪些人员的电话?