当截平面与圆柱轴线处于倾斜位置时，在圆柱面上产生的截交线是（）。A．两平行直线 B．

某病人，患乙型肝炎10余年，近日常感肝区疼痛，呈持续性胀痛或钝痛，触诊发现肝脏肿大，质地坚硬，表面凹凸不平，并可触到结节或巨块。该患者可诊断为

A．肝硬化
B．原发性肝癌
C．肝性脑病
D．急性胰腺炎
E．胆结石

补全对话（共5小题，每小题2分，满分10分）

根据语境，用恰当的语言完成对话。

—Excuse me. Who is your best pen pal, Jack?

—I have many pen pals. Mary is my favorite?

—1_________________________________

—She is very beautiful, and she has long curly blond hair.

—2__________________________________

—She comes from the USA.

—3____________________

—She speaks English and Chinese. And she speaks Chinese very well.

—Really? How great! Is she a student?

—Sure. We are studying in the same grade, grade eight.

—4. ______________________

—She says she wants to be a teacher. And she wants to work in China as an

English teacher.

—Maybe she can help me a lot with my English. Today it is very hot.

5.___________________

— I think it is not hot in USA. Mary often tells me it is warm there.

—Thank you for telling me so much about your pen pal.

—You are welcome.

根据汉语意思完成句子，每空一词。

1.对许多外国人来说使用筷子是很难的。

It’s    for many foreighners    use Chinese chopsticks.

2.我每天步行去学校只需10分钟。

It only    me ten minutes to    to school every day.

3.公园很近，为什么不肯走在去呢？

The park is quite near，           go threr on foot?

4.他们总是让我等很久。

He always makes me           a long time.

5.你介意我把门打开吗？

Would you    my    the door?

多媒体计算机中的媒体信息是指 (24) ，多媒体技术的主要特性有 (25) 。目前音频卡具备的功能有 (26) 。在多媒体计算机中常用的图像输入设备是 (27) ，国际标准MPEG-2采用了分层的编码体系，提供了4种技术，它们是 (28) 。

（25）处填（）。

A．多样性

B．多样性、集成性

C．多样性、集成性、交互性

D．多样性、集成性、交互性、可扩充性

一把游标卡尺，尺身每格为1mm，游标共有20格，当两个量爪合拢时，游标的20格刻线正好与尺身的19格刻线对齐，试计算游标卡尺的读数精度。