The best way of learning a language is using it .The best way of learning English is talking in English as much as possible. Sometimes you'll get your words mixed up ( 混合)and people will not understand you .Sometimes people will say things too quickly and you can't understand them. But if you keep your sense of humor (幽默感),you can always have a good laugh at the mistakes you make(你所犯的错误). Don't be unhappy if people seem to be laughing at your mistakes（错误）. It is better for people to laugh at your mistakes than to be angry with you. because they don't understand what you are saying .The most important thing for learning English is : “Don't be afraid of making mistakes because everyone makes mistakes. ”

表：蛋壳与蛋的距离和灭敌(乌鸦)吃蛋的比率

根据表中的数据所作的推论，正确的是 (    )

已知函数f(x)满足f(x+1)=-f(x)，且f(x)是偶函数，当$x\in 0,1$时， $f\left(x\right)=x^2$，若在区间-1,3内，函数g(x)=f(x)-kx-k有4个零点，则实数k的取值范围是（　　）

下列叙述正确的是(　　)