AIDS最常见的机会性感染是（） A.白色念珠菌感染 B.弓形虫感染 C.曲霉菌感染

在HLR冗余中，关于控制信令的正确陈述是（）：

A.当本节点出现故障时会向配对的HLR发出本节点失效的信息

B.周期性向配对HLR发出消息表明自身状态

C.当冗余用户的位置信息出现更新时，控制信令会及时将更新的信息送到配对HLR中

D.当冗余用户的永久信息出现更新时，控制信令会及时将更新的信息送到配对HLR中

某校化学兴趣小组设计了图示实验装置（图中省略了夹持仪器）来测定某铁碳合金中铁的质量分数，并探究铁与浓硫酸的反应。

⑴ m克铁碳合金中加入过量浓硫酸，未点燃酒精灯前，A、B均无明显现象，其原因是

①常温下碳与浓硫酸不反应；②   ___________________  。

⑵写出加热时A中碳与浓硫酸发生反应的化学方程式  ______________________  。

⑶B中的现象是：   _______________________________________  ；

C的作用是：  ___________________ _______________________  。

⑷待A中不再逸出气体时，停止加热，拆下E并称重，E增重bg。则铁碳合金中铁的质量分数为   _____________   (写表达式)。

(5)反应一段时间后，用滴管吸取A中的溶液滴入到适量水中作为试样，试样中所含金属离子的成分有以下三种可能:

Ⅰ:只含有Fe³⁺；Ⅱ:只含有Fe²⁺；Ⅲ:                                   。

△

验证Ⅲ的实验方法是                                                      。

阅读理解

     Young adult filmmakers all hope to show their works in international festivals like Sundance and

Toronto. But what about really young filmmakers who aren't in film school yet and aren't.strictly 

 speaking. even adults ?

     They are at the heart of Wingspan Arts Kids Film Festival. tomorrow. in a setting any director

might envy: Lincoln Center.Complete with  "red carpet" interviews and various  awards. thefestival

has much in common with events for more experienced moviemakers. except for the age of the

participants:about 8 t0 18.

     " What's really exciting is that it's film for kids by kids. " said Cori Gardner, managing director of

Wingspan Arts, a nonprofit organization offering youth arts programs in the New York area. This year

the festival will include films not only from Wingspan but also from other city organizations and one

from a middle school in Arlington,Virginia. " We want to make this a national event." Ms Gardner

added.

     The nine shorts to be shown range from a Claymation biography of B. B. King to a science fiction

adventure set in the year 3005. "A lot of the material is really mature. " Ms  Gardner said, talking about

films by the New York City branch of Global Action Project,a media arts and leadership-training

group. " The Choice is about the history of a family and Master Anti-Smoker is about the dangers of

secondhand smoke. " Dream of the Invisibles describes young immigrants'(移民) feelings of both

belonging and not belonging in their adopted country.

     The festival will end with an open reception at which other films will be shown. These include a music

video and a full-length film whose title is Pressures.

1. Wingspan Arts Kids Film Festival___________.    

A. is organized by a middle school

B. is as famous as the Toronto Festival

C. shows films made by children

D. offers awards to film school students

2. Which of the following is true of Wingspan Arts?   

A. It helps young filmmakers to make money.

B. It provides arts projects for young people.

C. It's a media arts and leadership-training group.

D. It's a national organization for young people.

3. The underlined word "shorts"in Paragraph 4 refers to_________.  

A. short trousers                  

B. short kids

C. short films                      

D. short stories

4. Movies to be shown in the festival_________.

A. cover different subjects   

B. focus on kids' life

C. are produced by Global Action Project

D. are directed by Ms Gardner

男，34岁，冬春季节上腹隐痛2年，伴返酸及饥饿痛，并有半夜痛，进食后疼痛缓解。

该患者体检时最可能出现的体征是（）

A.肠鸣音亢进

B.振水音阳性

C.腹部板状强直

D.右上腹压痛

E.移动性浊音阳性

企业资金支出的根源是（）

A.成本

B.投资

C.市场

D.以上都不是