问题 填空题

A、B、C三种化合物通过分解反应各自生成两种物质,如下所示(反应条件省略).

A→M+C   B→M+N    C→M+P

已知N是金属,常温下为液态;

(1)试推断(写化学式):M为______,N为______,A为______,P为______.

(2)完成各步的符号表达式.

答案

(1)N是金属,常温下为液态,所以N是汞,B会分解生成汞和M,所以B可能是氧化汞,M可能是氧气,A会分解生成氧气和M所以A可能是过氧化氢,C就是水,水分解生成氧气和氢气,经过验证,各物质都满足转换关系,所以,A是过氧化氢,B是氧化汞,C是水,M是氧气,N是汞,P是氢气,故答案为:O2,Hg,H2O2,H2

(2)过氧化氢在二氧化锰的催化作用下生成水和氧气,故答案为:过氧化氢

MnO2
水+氧气;

氧化汞在加热的条件下生成汞和氧气,故答案为:氧化汞

加热
汞+氧气;

水在通电的条件下生成氢气和氧气,故答案为:水

通电
氢气+氧气.

完形填空

阅读下列应用文及相关信息,并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。(选E涂AB,选F涂AC)

阅读下面六款手机的介绍,选出符合各人需求的最佳款式。

Featured phones

A. Nokia-6010

Price: $24.99    Color display: Yes     Wireless Internet ready: Yes     

Digital camera: No    2-way text messaging: Yes    Talk time: Up to 330 minutes

Standby time: Up to 240 hours      Weight: 5.08 ounces  

Dimensions: 4.68”×1.97”×0.90”

Games: Backgammon, Bowling, Air glide, and Sky diver plus downloadable Java games

B. Motorola-C650 (Camera phone)

Price: $99.99   Color display: Yes          Wireless Internet ready: Yes

Digital camera: Yes       2-way text messaging: Yes   Talk time: Up to 210 minutes

Standby time: Up to 215 hours            Weight: 3.10 ounces            

Games: Downloadable games

C. Samsung-V1660 on Sprint PCS

Price: Free             Color display: Yes                Wireless Internet ready: Yes

2-way text messaging: Yes                  Talk time: Up to 204 minutes Standby time: Up to 168 hours

Weight: 3.54 ounces                    Memory locations: 200 entry phonebook

D. Motorola-SLVR-L7

Price: $206.4       Color display: Yes         Wireless Internet ready: Yes

Digital camera: Yes                                   2-way text messaging: Yes   

Talk time: Up to 450 minutes

Standby time: Up to 345 hours            Weight: 3.39 ounces     

Dimensions: 4.45”×1.93”×0.45”

Games: Enjoy pre-loaded J2ME games or downloadable games

E. Nokia-8010

Price: $124.99      Color display: Yes       Wireless Internet ready: Yes

Digital camera: No               2-way text messaging: Yes   

Talk time: Up to 330 minutes

Standby time: Up to 240 hours            Weight: 4.08 ounces     

Dimensions: 3.68”×1.27”×0.70”

Games: Downloadable games

F. Kyocera-SE47 slider on venison wireless

Price: $149.99     Color display: Yes       Wireless Internet ready: Yes

Digital camera: No                             2-way text messaging: Yes   

Talk time: Up to 210 minutes

Standby time: Up to 100 hours            Weight: 3.39 ounces           Memory locations: 200 entry phonebook

阅读下面信息介绍,并按照要求匹配信息。首先,请阅读下列信息:

小题1:Susan is at a middle school. Her parents want to buy her a cheaper cellphone without games installed.

小题2:Mike intends to buy a phone with longer talk time and standby time and it must not be expensive.

小题3:Jane is at college. She would like to buy a phone which can slide the face up to make a call, and slide it down when you’re done and it has to be light.

小题4:George would like to have a cheaper phone with digital camera.

小题5:Tom only buys Nokia. He lost one and he wants to buy another which is smaller.

小题6:Susan                     A. Nokia-6010

小题7:Mike                         B. Motorola-C650(Camera phone)

小题8:Jane                      C. Samsung-V1660 on Sprint PCS

小题9:George                  D. Motorala-SLVR-L7

小题10:Tom                    E. Nokia-8010

F. Kyocera-SE47 slider on venison wireless

单项选择题 A1型题