公共事业包括()
A、教育事业
B、科技事业
C、文化事业
D、卫生事业
E、体育事业
F、社会保障事业
G、公用事业
参考答案:A, B, C, D, E, F
— How old is the bridge over there?
— Oh, it's very old. It _____ about eight hundred years ago. [ ]
A. has built
B. is built
C. was building
D. was built
集体创新方法有()
A、头脑风暴法
B、组织法
C、列举法
D、综摄法