最常见的PTN业务QOS流的分类有哪三类（）。 A.AF B.EF C.DE D.B

阅读理解：阅读短文，完成后面5个小题，正确的“T”用表示，错误的用表示“F”。

       A water-saving campaign was started among school children in Beijing to spread the message of

Green Olympic.

       "Which seasons see more precipitation (江水) in Beijing?" "Summer and winter."

       This was a simple conversation between Zhou Youhong-a member of the Beijing Olympic Green

Action Promotion Group (北京奥运会绿色行动宣传团) and some school kids during Zhou's speech

on environmental protection.

       The interesting activity carded the message that is trying to tell the future generations (几代人) as

they jointly launched (发起) a water-saving campaign among the kids.

       As a part of the plan to promote "Green Olympics", the campaign called on students of over 1,000

primary schools in the city to take part in it this year.

       During the launch ceremony of the campaign, the students were given water-saving materials. They

posted water-saving tips at every comer of the school to remind other people to cherish (珍惜) the water

resources.

       Students were encouraged to bring the message to their family members and show their feedback

(反馈) on schools' blackboards.

       "We hope that through this campaign, the young people will increase the awareness (意识) of

environmental protection," said Xu Xiaoxuan, director of BOCOG (北京奥组委) Environmental

Activity Dept. "Such practice is of great meaning not only for the kids, but also for every member o2"

the society," he continued.    

( )1. Zhou Youhong was a member of the Beijing Olympic Green Action Promotion Group.

( )2. The campaign called on all the people in the city to take part in it.    

( )3. Students can show their feedback on schools' blackboards.     

( )4. The campaign was of great meaning only for the kids.                

( )5. The main idea of this passage is to let children learn to save water.    

某结石病患者尿液中出现大量无色、六边形、折光性强的片状结晶，该晶体成分是（）。

A.色氨酸

B.亮氨酸

C.酪氨酸

D.胱氨酸

E.丙氨酸

测量肩关节的屈伸活动度应将轴心定于（）。

A.鹰嘴

B.肩峰

C.锁骨

D.肩胛骨

E.肱骨

Java对象串行化技术，主要是通过______类和ObjectOutputStream类来实现。

段落的标记是在输入（）之后产生的。

A.句号

B.Enter键

C.Shift+Enter

D.高级语言