如图14所示是探究平面镜成像特点的实验装置图。将一块玻璃板竖直架在一把刻度尺的上面，并保持玻璃板与刻度尺垂直。再取两根完全相同的蜡烛A和B分别竖直置于玻璃板两侧的刻度尺上，点燃玻璃板前的蜡烛A，进行观察和调整。用此实验可以研究：①像与物大小的关系；②像与物到平面镜距离的关系；③平面镜成的是虚像还是实像。
（1）选用刻度尺的作用是为了便于比较_________；（选填“①”、“②”或“③”）
（2）选用两根完全相同的蜡烛是为了比较________；（选填“①”、“②”或“③”）
（3）在利用蜡烛B确定出蜡烛A所成像的位置后，移去蜡烛B，并在其所在位置上放一光屏，则光屏上_________（选填“能”或“不能”）接收到蜡烛A的像。

用括号内所给动词的适当形式填空。

1.I ________ (read) a novel last night when I heard knocks at the door.

2.The young man ________ (live) alone since he graduated from college.

3.Be careful ___________ (not fall) off the ladder.

4.The actor and director ________(be) coming to give us a speech next weekend.

5.I overslept this morning. By the time I got to the train station, the train ________ (leave).

 

Obama goes on a trip to Beijing and Shanghai on November11th to 15th 2009.

Obama has a four-day visit to China. He has a very busy schedule(日程). But he still spends some time visiting the Forbidden City and the Great Wall.

Obama spends 50 minutes in the Forbidden City . He thinks the Forbidden City is a “beautiful place to visit”. He said, “I will come back with my girls and my wife.”

The next day, he takes quick tour of the Great Wall at Badaling. Obama has a good time there. He who has never been to the Great Wall is not a true man. US President Barack Obama is a true man.

根据短文内容，用适当的词或短语完成下列表格。(词数不限)

Obama’s first 1.            to China

First Obama visits the 2.___________________, then he goes to the  ________________.

It takes him 3.______________ to visit to China.

It’s true that Obama has a great4._______ visiting China.

Obama says that he will 5._______________ with his family again.

 

Jeff Green can not look after(照看) his things. Look, this is his room. He doesn’t put his things away（收好） every day. Look at his desk. Many things are on it. They are notebooks, CDs, video tapes, pens, pencils. He doesn’t put his pens and pencils in his pencil case. Look, some of his sports collections are on the desk and chairs.
It’s eight o’clock in the morning, and Jeff is in bed. It’s Sunday. He doesn’t go to school. Oh, what’s under the bed? A football. He likes playing football. He can not play volleyball well. His backpack is under the bed. Why is his backpack under the bed? We don’t know. What’s that under the sofa? It is one of his socks. Where is the other（另外的） one? Sorry, we can not see it. Jeff needs to ask his parents to find it, I think.
【小题1】 根据His backpack is under the bed.可知答C
【小题2】根据A football. He likes playing football. 可知答A
【小题3】根据What’s that under the sofa? It is one of his socks. Where is the other（另外的） one? Sorry, we can not see it.可知选C
【小题4】根据It’s eight o’clock in the morning, 可知选A
【小题5】故短文描述，可知杰夫每天的物品摆放的很混乱，故选A 
【小题6】 Where is Jeff’s backpack?

A．It is on his desk.	B．It is under his school things.
C．It is under his bed.	D．It’s on the sofa.

【小题7】 What sport does Jeff like?

A．Football.

B．Basketball.

C．Volleyball

D．Baseball.

【小题8】 Where are Jeff’s socks?

A．They are on his sofa.

B．They are under his bed.

C．One of his socks is under the sofa, but we can not see the other one.

D．They are under the desk.

【小题9】 What time is it now?

A．It’s 8 am.	B．It’s 8 pm.
C．It’s time for bed.	D．It’s time for breakfast.

【小题10】Does Jeff put his things away every day?

A．No, he doesn’t.	B．Yes, he does.
C．Sorry, I don’t know.	D．He puts his school things away.