现有室温下浓度均为1×10-3mol/L的几种溶液①盐酸、②硫酸、③醋酸、④氯化

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问题:

现有室温下浓度均为1×10-3mol/L的几种溶液①盐酸、②硫酸、③醋酸、④氯化铵、⑤氨水、⑥NaOH溶液,回答下列问题:

(1)PH均等于3的溶液①、②、③、④中水电离产生的c(H+)的比值是         

(2)将③、⑥混合后,若溶液呈中性,则消耗两溶液的体积为③   ⑥(填“>”、“<”或“=”),溶液中的离子浓度由大到小的顺序为                                         

(3) 将等体积的①、⑤混合,则溶液的PH     7(填“>”、“<”或“=”),用离子方程式说明其原因                                                  

(4)向相同体积的①、②、③溶液中分别加入相同的且足量的锌粒,反应的初始速率由快到慢的顺序为            ,最终产生H2总量的关系为                 

(5)向相同体积的①、③溶液中分别加入相同浓度、相同体积的CH3COONa溶液,充分混合后,混合液的PH大小关系为①      ③(填“>”、“<”或“=”)

(6)若将等体积的⑤、⑥溶液加热至相同温度后,溶液的PH⑤    ⑥(填“>”、“<”或“=”)

考点:燃烧热水的离子积常数水电离的影响因素水的电离平衡
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三相鼠笼型异步电动机都可以用Y-△降压启动。

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经血时暴下不止或淋漓不尽,最恰当的称谓是

A.经崩

B.经漏

C.崩漏

D.漏下

E.崩中

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Even before World War Ⅱ ended in 1945,many world leaders dreamed of a new organization that would keep international peace and safety,and encourage international cooperation(合作).An organization was formed.The United Nations was to work to this ideal of mankind.

When the UN was founded in 1945,it was made up of fifty members.Fifteen members sat on the Security Council(安理会).Five members—the United States,the Soviet Union,Great Britain,France and China—were given,not changing membership on the Council.The Council was given the power to settle fights among nations by persuasion,mediation(调解) or other means.A General Assembly(联合国大会),which included every UN member,was also set up.The Assembly could consider,discuss,and pass resolutions(决议案).

As the UN passed its fortieth birthday in 1985,it came under increasingly sharp attack by Americans.It declared that the UN is unfit as a peace keeper and cited(援引) 130 wars since 1945 as a proof(证据).

The UN’s supporters say that the organization is the world’s best hope for peace.The UN provides,supporters also point out,much needed economic and technical help to less developed nations.

小题1:The function(功能)of the Security Council is ________.

A.to keep international peace and security and promote(促进) international cooperation

B.to consider,discuss,and pass on blinding resolutions

C.to settle disputes(争端) among nations by persuasion,mediation or other means

D.to keep international peace and security by force小题2:Why has the UN come under increasingly sharp attack by Americans since 1985?

A.Because the UN has been unfit as a peace keeper.

B.Because 130 wars have broken out since 1945.

C.Because the US hasn’t been able to control the UN completely since 1985.

D.Because the US was not satisfied with the UN since 1985.小题3:What do you think of the UN’s supporters’ words?

A.They are fair.

B.They are unfair.

C.They are for the UN’s supporters.

D.They sharply attack Americans.小题4:The UN’s supporters ________.

A.probably belong to the third world

B.are developed countries

C.must be people from Africa and Europe

D.may not be members of the UN

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以下除哪一项外,均为粉碎操作时应注意的问题()

A.粉碎过程中及时过筛

B.粉碎毒剧药时应避免中毒

C.药材入药部位必须全部粉碎

D.药物不宜过度粉碎

E.药料必须全部混匀后粉碎

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某市一栋综合楼,地下共4层,地上共20层,采用框架剪力墙结构,总建筑面积30万m2,主楼与其裙房之间设有防火墙等防火分隔设施,主楼各层建筑面积均大于1000m2。该综合楼总平面布局及周边民用建筑等相关信息如图1所示。该综合楼地下3、4层均为人防层,其主要使用功能均为普通汽车库、复式汽车库和储存可燃固体的库房;地下2层主要使用功能为展览厅、管理用房及燃气锅炉房、柴油发电机房、变压器室、配电室、消防泵房等设备用房;地下1层主要使用功能为消防控制室、管理用房及商场营业厅。主楼首层主要使用功能为门厅、咖啡厅、自助餐厅、商场营业厅,地上2、3层主要使用功能为儿童游乐厅、展览厅、商场营业厅,地上4~19层主要使用功能为办公室,地上20层主要使用功能为会议厅、多功能厅。裙房1~6层主要使用功能为商场营业厅。该建筑按有关国家工程建设消防技术标准配置了室内外消火栓给水系统、自动喷水灭火系统和火灾自动报警系统等消防设施及器材。

根据以上场景,回答下列问题。

消防水泵的启动方式分为哪几种?

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