给下列答话选择合适的问句。

1. I'm twenty years old. [ ]

A. How are you?

B. How old are you?

2. It's one thirty. [ ]

A. What's the time?

B. What's time is it?

3. I'm 1.3 metres tall.[ ]

A. How tall you are?

B. How tall are you?

4. I live in a house on the First Avenue.[ ]

A. Where do you live?

B. When do you live?

5. My address is 746 the Second Avenue.[ ]

A. What's your address?

B. What your address?

如图，轻质杠杆OA可绕O点转动，OA=0.3米，OB=0.2米．A点处挂一质量为2千克的物体G，B点处加一竖直向上的力F，杠杆在水平位置平衡，则物体G的重力大小为______牛，力F大小为_____牛．