根据短文填空，回答下列问题。
This is my bedroom. There are many (许多) things in it. You can see a table, a bed, a drawer, a
dresser, a computer, a bookcase, a sofa, a chair, a backpack, a plant and some books in it. The boocase
is behind the sofa. The books are on the table and the bookcase. My backpack is behind the door.oh,
where are the keys? They are on the dresser.
1. Where is the boocase ?
__________________.
2. What is on the table and the bookcase?
__________________.
3. Where are keys?
__________________.
4. Where is the backpack?
__________________.
5.Can you see a computer in the bedroom?
__________________.
水平，质点
从
点正上方高
处自由下落，经过轨道后从
点冲出竖直上抛，上升的最大高度为
为( )
