第一节    听力理解(5段共15小题;每小题2分,满分30分)

每段播放两遍。各段后有几个小题,各段播放前每小题有5秒钟的阅题时间。请根据各段播放内容及相关小题,在5秒钟内从题中所给的A、B、C项中,选出最佳选项,并在答题卡上将该项涂黑。

听第一段对话,回答第1-3题。

1.   Where probably is the woman now?

    A. In the Emergency Services.

    B. In an elevator.

    C. On the 15th floor of the Brill building.

2.   What is the problem with the woman’s friend?

    A. She has been bitten by a dog.        

B. She is having difficulty in breathing.          

C. She fell downstairs and was out.

3.   What advice does the man give the woman?

    A. She should keep her friend calm and far away from the dog.

    B. She should leave her friend where she is.      

C. She should send a rescue team and an ambulance right away.

听第二段对话,回答第4-6题。

4.   How old is the man?

    A. 78.          B. 75.          C. 72.

5.   What do you learn from the conversation?

    A. No streets of the city are more glorious than Sweet Jesus.

    B. The woman is looking for her client’s office.

    C. The woman is new to the city.

6.   Where is the building?

    A. It’s at No.149.

    B. It’s on the left of Joe’s.

    C. It’s three blocks away next to a baker’s.

听第三段对话,回答第7-9题。

7.   How many home accidents involving children can be prevented every year in Britain?

    A. About 10,000.         B. About 900,000.         C. About 1,000,000.

8.   What do we learn about parents?

A. Parents should use mats to prevent children slipping on the floor of the bathroom.

B. Parents should keep the appliances, hot foods within reach.

C. Parents should accompany children all the time.

9.   According to the woman, which is the most dangerous room in the house?

    A. The bathroom.         B. The kitchen.          C. The living room.

听第四段对话,回答第10-12题。

10.  When did the earthquake strike?

    A. At midnight.      B. At dawn.       C. At dusk.

11. What do we know about the earthquake?

    A. It was a mild one.

    B. There was more than one aftershock.

    C. There were no other survivors.

12. What happened to the apartment building?

A. It collapsed completely.

B. Half of the building was in ruins.

C. The first floor was totally flattened.

听第五段独白,回答第13-15题。

13. What is the talk mainly about?

  A. The prize wars. 

B. The entertainment awards.

C. The Grammy Awards, Golden Globes and People’s Choice Awards.

14. In some people’s opinion, what draws more attention in ceremonies?

  A. What the winners say.

  B. What the winners wear.

  C. What the winners show.

15. What impresses the speaker most?

  A. The pre-show.

  B. The announcement of winners.

  C. What the stars will say.

18.(本小题满分14分)

如图,已知正方形和矩形所在平面互相垂直,

是线段的中点.

(1)求证:∥平面

(2)求二面角的大小;

(3)试问:在线段上是否存在一点,使得直线

所成角为

解:方法一:(1)记的交点为,连接,

 ∵分别是的中点,是矩形,

∴四边形是平行四边形,∴.

平面BDE平面

∥平面.     ……………………………………………………………… 4分

(2)在平面中过,连结

⊥平面

,又  平面 

是二面角的平面角.      ……………………………………… 6分

中,

∴二面角的大小为.     ……………………………………………… 9分

(3)设(),作Q,则

⊥平面

平面,∴. 

中,.

为等腰直角三角形,∴

又∵Δ为直角三角形,∴

(舍去).

∴点的中点.        ……………………………………………………… 14分

方法二:(1)建立如图所示的空间直角坐标系.设,连接

则点的坐标分别是(,∴(,

又点的坐标分别是()、(,∴=(

=不共线,∴.

又∵平面BDE平面,∴∥平面.   ………………… 4分

(2)⊥平面.

为平面的法向量.

=(·=0,

·=(·

 得,  ∴为平面的法向量.

<,>,∴的夹角是.

即所求二面角的大小是.   ……………………………………………… 9分

(3)设 ,得,∴

又∵所成的角是.

解得(舍去),即点的中点.   …………………………… 14分

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