公安行政处罚就是对违反公安行政管理法律、法规的公民实施的行政制裁。( )

某建设项目在投标答疑阶段，投标人甲就招标文件某一设备型号提出的疑问，招标人在进一步澄清时，须（）。

A.书面通知投标人甲

B.书面通知所有的投标人

C.口头通知投标人甲即可

D.口头通知所有的投标人

（18分）锡是一种银白色而又柔软的金属, 2000年前人类就已开始使用锡。金属锡为排列在白金，黄金及银后面的第四种贵金属，它富有光泽、无毒、不易氧化变色，具有很好的杀菌、净化、保鲜效用。生活中常用于食品保鲜、罐头内层的防腐膜等。请回答下列有关锡的问题：

（1）锡在自然界几乎都以锡石的形式存在，此外还有极少量的锡的硫化物矿。以锡石（SnO₂）为原料，用足量的焦炭作还原剂，在高温下可制得粗锡，该反应的化学方程式为                 ，粗锡经电解精炼可得纯锡，精炼时的阴极反应式为____________。

（2）锡的氯化物有SnCl₂和SnCl₄。SnCl₂是生产和化学实验中常用的还原剂，易发生水解；SnCl₄常温下是无色液体，在空气中极易水解，熔点—36℃，沸点114℃。

Ⅰ．若实验室中以SnCl₂固体配制SnCl₂溶液，试简述操作方法     。

Ⅱ．某实验小组拟利用下图中的仪器，设计组装一套实验装置，用熔融的金属锡与干燥的氯气直接作用制取无水四氯化锡(此反应过程放出大量的热)，已知金属锡的熔点为231℃。请回答下列各问题:

①用玻管(未画出)连接上述装置，正确的顺序是(填各接口的代码字母)____接____、____接____、____接____、____接____、____接____。

②装置Ⅵ的作用是___________；装置Ⅳ的作用是___________。

③冷凝管里冷却水的流向是从___________进入，从___________流出。

④试验时点燃Ⅰ处酒精灯，加热温度应大于         ℃，待                   即可停止加热。

⑤如果将制取的四氯化锡少许暴露于空气中，预期可看到的现象是_______________。

⑥该实验装置中还存在的一个问题是                                 。

How often one hears children wishing they were grown up, and old people wishing they were young again. Each age has its pleasures and its pains, and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets.

Childhood is a time when there are few responsibilities to make life difficult. If a child has good parents, he is fed, looked after and loved, whatever he may do. It is impossible that he will ever again in his life be given so much without having to do anything in return. In addition, life is always presenting new things to the child-things that have lost their interest for older people because they are too well-known. But a child has his parents, he is not so free to do what he wishes to do. He is continually being told not to do things or being punished for what he has done wrong. When the young man starts to earn his own living, he can no longer expect others to pay for his food, his clothes, and his room, but has to work if he wants to live comfortably. If he spends most of his time playing about in the way that he used to as a child, he will go hungry. And if he breaks the laws of society as he used to break the laws of his parents, he may go to prison. If, however, he works hard, keeps out of trouble and has good health, he can have the great happiness of building up for himself his own position in society.

小题1:according to the second paragraph, the writer thinks that _______.

A．life for a child is comparatively easy

B．a child is always loved whatever he does

C．if much is given to a child, he must do something in return

D．only children are interested in life小题2:After a child grows up, he ________.

A．will have little time playing

B．has to be successful in finding a job

C．can still ask for help in time of trouble

D．should be able to take care of himself小题3:Which of the following statements is NOT true according to the passage?

A．People are often satisfied with their life.

B．Life is less interesting for old people.

C．Adults are freer to do what they want to do.

D．Adults should no longer rely on others.小题4:The main idea of the passage is ________.

A．life is not enjoyable since each age has some pains

B．young men can have the greatest happiness if they work hard

C．childhood is the most enjoyable time in one’s life

D．one is the happiest if he can make good use of each age in his life小题5:The paragraph following this passage will most probably discuss _______.

A．examples of successful young men

B．how to build up one’s position in society

C．joys and pains of old people

D．what to do when one has problems in life

患者男，35岁。头痛、头晕1年，1周来加重伴心悸、乏力、鼻出血及牙龈出血来诊。查体：血压170/110mmHg，皮肤黏膜苍白。Hb65g/L，PLT148×10/L，尿蛋白（+++），尿红细胞3～5/HP.BUN38mmol/L，SCr887μmol/L，肌酐清除率（CCr）10ml/min。肾脏B超左肾8.9cm×4.6cm×4.1cm，右肾8.7cm×4.4cm×4.1cm，双肾皮质变薄。

该患者最佳的治疗措施是（）

A.纠正贫血

B.控制高血压

C.积极止血

D.胃肠透析

E.血液净化

（）是视觉识别设计要素的延伸和发展，与标志、标准字体、标准色保持宾主、互补、衬托的关系。

A、企业象征图案

B、标准字

C、标准色

D、企业造形