下列函数公式中，平均函数是（）
A、SUM
B、COUNT
C、MIND
D、AVERAGE
参考答案：D
If they win the final tonight, the team are going to tour around the city ______ by their enthusiastic supporters.
A．being cheered
B．be cheered
C．to be cheered
D．were cheered
以下哪种生物没有细胞结构： [ ]
A．水稻
B．青蛙
C．细菌
D．乙肝病毒
