过椭圆$C:\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\left(a>b>0\right)$的左顶点A的斜率为k的直线交椭圆C于另一个点B，且点B在x轴上的射影恰好为右焦点F，若$\frac{1}{3}<k<\frac{1}{2}$则椭圆离心率的取值范围是（   ）

根据短文内容。选择适当的短语完成句子。    A man goes to a fast food restaurant for lunch. "Hi!" a waiter says. "Can I help you?"
    "I'd like a hamburger。French flies and a medium pizza, "says the man.
    "Anything else?'' the waiter asks.
    "No, "the man answers. "That's all. ''
    "Is that for here or taking away?" the waiter asks.
    "Taking away, "says the man.
    The man pays for his lunch. The waiter puts the man's lunch in a bag. 'The man takes the bag away.
    "Thank you!" the waiter says. "Have a nice day."
    The man walks to a park. He sits down and opens the bag. To his surprise(使他吃惊的是), there are no hamburgers in the bag. There are no French fries. There is no pizza. There is money(钱)in the bag a lot of money. The man counts the money--2, 000 dollars!
    Why is the money in the bag? The man doesn't know. Do you know? Can you guess?

A. to a park      B. a lot of money      C. the man's lunch in a bag D. "I'd like a hamburger, French fries and a medium pizza.'' E. to a fast food restaurant for lunch

若关于x的方程在区间（0，1）上有解，则实数m的取值范围是

下列动物中，属于鱼类的是（　　）

某同学在“探究生长素类似物IBA促进银杏插条生根的最适浓度”实验中获得了下表所示结果，有关本实验分析或评价的叙述错误的是（    ）

枝  条	甲  组	乙  组	丙  组
溶  液	10﹣10mol/L的IBA溶液	10﹣5mol/L的IBA溶液	清  水
生根数量（条）	43	8	22