如图所示，将一挂在弹簧测力计下的圆柱体金属块缓慢浸入水中（水足够深），在圆柱体接触容器底之前，图中能正确反映弹簧测力计示数F和圆柱体下表面到水面的距离h的关系的图象是（　　）

用一个圆心角为90°半径为32cm的扇形作为一个圆锥的侧面（接缝处不重叠），则这个圆锥的底面圆的半径为____ cm．

从方框中选择最佳选项完成对话。

A: Mum, I'm hungry. ____

B: Let me see. Yes, we have got some f ood in the fridge, but we haven't got any drinks.

A: ____

B: No, we haven't got any rice.

A: ____

B: Yes, we've got some carrots and potatoes in the fridge.

A: I want to eat some bananas.

B: Sorry.____How about some apples?

A: No, I don't like apples.

B: No problem. ____

A: OK! Let's go.