如图，直线AB和EF相交于O，OC平分∠AOB，∠COE=65°，试求∠FOB的度数．

函数$f\left(x\right)=2^x+x^3-2$在区间$\left(0,2\right)$内的零点个数是（  ）

地球上最大的生态系统叫做（ ）

---Hi, Jane. Are you free at six this evening? I was wondering if you could come with me to see the movie “X-men”.
---I’m sorry but I         it already. Besides, I         my mother do the laundry.

《骆驼祥子》中谁让祥子买车“吃车份”、做小买卖的生意，他不屑一顾。（   ）