50岁妇女，2个月来因消瘦行妇科检查，发现盆腔肿物。胃溃疡20多年，已绝经2年。妇科

2008年与2004年相比，表中企业出口额实现翻一番的经济类型有( )。

A．1个
B．2个
C．3个
D．4个

以下关于双端固定桥固位体的说法中错误的是（）

A．要有共同就位道

B．共同就位道应与牙长轴平行

C．固位体固位力应与力大小相适应

D．两端固位体的固位力应基本相等

E．固位体固位力应与桥体跨度相适应

书面表达 。

     假定你是李华，第11届全运会将在济南举办，现正在招募志愿者，你希望成为其中一员。

请按要求用英文给组委会写一封信。

     内容应包括： 1. 个人情况(年龄，性别，学历)

                           2. 个人条件(爱好体育，善于交际，乐于助人，熟悉本地情况)

                           3. 承诺(提供最佳服务)

     注意： 1. 词数100左右，开头语已为你写好; 

                  2. 可适当增加细节，以使行文连贯;

Dear Sir / Madam,

     My name is Li Hua. I'd like to work as a volunteer for the 11th National Games.

_______________________________________________________________________________

_______________________________________________________________________________

                                                                                                                             yours,

                                                                                                                             Li Hua

Conversation 2

Questions 8 to 10 are based on the following conversation.

[听力原文]8-10

W: Good afternoon, sir. May I see your passport, please

M: Of course. Here you are.

W: What is the purpose of your visit Business or pleasure

M: Pleasure.

W: I see. How long will you be staying in the U. S.

M: Two weeks. I’ll be leaving on June 10th.

W: Where do you intend to visit while in the country

M: LA first, then I’ll be heading on to New York City.

W: Do you have a return ticket to China

M: Yes, however, I’ll be returning via Japan—not going back to China directly.

After visiting, what will the man do（）

A．Go directly to China.

B．Go to Japan.

C．Go to China through Japan.

D．Go to Japan through Chin

因为噪声是属于随机信号，所以噪声波形是随机的。