选出不同类的一项。

一位同学身高1.7m，站在1m的平面镜前，他在镜中的身高是（　　）
　 

A. go to see him         

B. have a lot of fun

C. under the tree                    

D. at Christmas

E. a Christmas tree                

F. buy presents

G. a turkey and Christmas puddings

A:What do you do ____?

B: First, we ____ for our family and friends. We need to buy____.We put our presents ____.It looks great.

A:What do you like best at Christmas?

B:I like Father Christmas. We sometimes ____.

A:What do you eat that day?

B:I eat ____ .

A:So you ____at Christmas.

下列诸侯国中，不属于战国七雄的是（　　）

如图，在圆柱O₁O₂内有一个球O，该球与圆柱的上、下底面及母线均相切，记圆柱O₁O₂的体积为V₁，球O的体积为V₂，则 $\frac{V_1}{V_2}$ 的值是____．