Look at this picture! It’s a picture of a room. What can you see in the picture? I can see an apple on the table. Can you see an English book on the table? No, I can’t. Where is it? It’s in the schoolbag! The schoolbag is on the chair next to(紧挨着) the bed. What is next to the table? Oh, it’s a bookcase. Some books are in it. Look! What’s that under the chair? It’s a cat. A ball is beside(旁边) the cat. The ball is mine. It is a volleyball. I like playing volleyball very much.

小题1:Where’s the English book?

A．It’s on the table.

B．It’s on the bed.

C．It’s in the schoolbag.

D．It’s in the bookcase.小题2:     is next to the table.

A．A bookcase

B．A chair

C．A bed

D．An orange小题3:Where can you see the ball?

A．Under the table.

B．Under the bed.

C．Beside the cat.

D．Beside the chair.小题4:Where is the cat?

A．It’s next to the bed.

B．It’s under the chair.

C．It’s on the soccer.

D．It’s on the bed.小题5:You can’t see       in this room.

A．a book

B．a chair

C．a dresser

D．a schoolbag

如图所示，a、b两个带电小球，质量分别为m_a、m_b，用绝缘细线悬挂，两球静止时，它们距水平地面的高度均为h（h足够大），绳与竖直方向的夹角分别为α和β（α<β），若剪断细线Oc，空气阻力不计，两球电量不变，重力加速度取g，则（ ）

A．a球先落地，b球后落地

B．a、b两球同时落地

C．整个运动过程中，a、b系统的电势能增加

D．落地时，a、b两球的动能之和小于（m_a+m_b）gh