(7分)为了探究HClO的漂白性,某同学设计了如下的实验。 (1)通入Cl2后

题型:实验题

问题:

(7分)为了探究HClO的漂白性,某同学设计了如下的实验。

(1)通入Cl2后,从集气瓶A中干燥的红色布条的现象可得出的结论是                 ;从集气瓶B中湿润的红色布条的现象可得出的结论是                  ,其中发生的反应的化学方程式为                                              

(2)为了确证是HClO使湿润的红色布条褪色,你认为还应增加的实验是              

(3)烧杯中溶液所起的作用是                                           ,烧杯中所发生反应的化学方程式为                                    

(4)为保证实验安全,当氯气以每分钟1.12L(标准状况)的流速匀速通入时,若实验需耗时4分钟,小烧杯中盛2 mol·L—1的NaOH溶液的体积至少应为__________mL。

考点:氯气氯气用于自来水消毒杀菌氯的其他化合物(高氯酸、氯化物、氯酸盐,盐酸等)漂白粉、漂粉精
题型:实验题

最不可能存在以前尚未识别的关联方的情况是()

A、以市场公允价格出售紧俏商品

B、大量购入并不需要的材料或滞销的商品

C、采用预付货款的方式采购市场上并不紧缺的原材料或商品

D、收取大量的货款却迟迟不发货

题型:实验题

读“西亚、北非地理位置图”,填写地理事物名称:

③________(大洋);④________(海);⑤________(海);⑥________(海);

⑧________(内陆湖);⑨________(半岛);⑩________(沙漠)

题型:实验题

大部分的火灾死亡是因()而造成的。

题型:实验题

关于子宫内膜的叙述,下面哪一项是正确的

A.在矢状面上测量时应包括双层内膜的厚度
B.横切面测量最可靠
C.只应包括一层内膜
D.经腹部超声检查时测量最可靠
E.在整个月经周期变化不大

题型:实验题

In our society, we must communicate with other people. A great deal of communicating is performed on a person-to-person (1) by the simple means of speech. If we travel in buses, stand in football match (2) , we are likely to have conversations (3) we give information or opinions, and sometimes have our views (4) by other members of society.

Face-to-face contact is (5) the only form of communication, and during the last two hundred years the (6) of mass communication has become one of the dominating factors of contemporary society. Two things, (7) others, have caused the enormous growth of the communication industry. Firstly, inventiveness has (8) advances in printing, photography and so on. Secondly, speed has revolutionized the (9) and reception of communications so that local news often (10) a back seat to national news.

No longer is the possession of information (11) to a privileged minority. Forty years ago people used to (12) to the cinema, but now far more people sit at home and turn on the TV to watch a program that (13) into millions of houses. Communication is no longer merely concerned (14) the transmission of information. The modern communications industry influences the way people live in society and broadens their horizons by allowing (15) to information, education and entertainment. The printing, broadcasting and advertising industries are all (16) with informing, educating and entertaining. (17) a great deal of the material communicated by the mass media is very valuable to the individual and to the society (18) which he is a part, the vast modern network of communications is (19) to abuse. However, the mass media are with us for better, for worse, and there is no turning (20) .

19()

A.possible

B.likely

C.close

D.open

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