按供水用途，给水系统基本上可以分为（）等三种。 A.生活 B.办公 C.生产 D.安

理解诗中的句子，选择合适的意思。

人影给溪水染绿了。[ ]

A．人影把溪水染绿了。 

B．人影被溪水染绿了。

碘被称为“智力元素”，科学合理地补充碘可防止碘缺乏病．碘酸钾(KIO₃)是国家规定的食盐加碘剂，它的晶体为白色，可溶于水．碘酸钾在酸性介质中与过氧化氢或碘化物作用均生成单质碘．以碘为原料，通过电解制备碘酸钾的实验装置如图所示．请回答下列问题：

(1)碘是________(填颜色)固体物质，实验室常用________方法来分离提纯含有少量杂质的固体碘．

(2)电解前，先将一定量的精制碘溶于过量氢氧化钾溶液，溶解时发生反应：3I₂＋6KOH===5KI＋KIO₃＋3H₂O，将该溶液加入阳极区．另将氢氧化钾溶液加入阴极区，电解槽用水冷却．电解时，阳极上发生反应的电极反应式为________；阴极上观察到的实验现象是_____________________________．

(3)电解过程中，为确定电解是否完成，需检验电解液中是否有I^－.请设计一个检验电解液中是否有I^－的实验方案，并按要求填写下表．要求：所需药品只能从下列试剂中选择，实验仪器及相关用品自选．试剂：淀粉溶液、碘化钾淀粉试纸、过氧化氢溶液、稀硫酸.

(4)电解完毕，从电解液中得到碘酸钾晶体的实验过程如下

步骤②的操作名称是________，步骤⑤的操作名称是________．步骤④洗涤晶体的目的是________________________________________________________________________．

要迅速明确上消化道出血的部位及病因，应选用（）。

A．三腔两囊管检查

B．CT检查

C．纤维胃十二指肠镜检查

D．选择性腹腔动脉造影

E．MRI检查

在甲国登记的法人A，其章程中规定的住所地在乙国，其主要办事机构所在地在丙国。现在中国法院审理涉及法人A在中国业务的案件。请问依据我国法律的规定，法院应以哪里作为该法人A的住所?()

A.在甲国的登记地

B.在乙国章程规定的住所地

C.在丙国的主要办事机构所在地

D.在中国的营业地

阅读理解

     Researchers recently made a survey about how people know trees in UK.They showed them

pictures of 10 of Britain's most popular types of trees.They  asked them to name each.Many British

people cannot give the right answers.

      One in 20 people questioned could not name any of the Britain's common  trees.Horse chestnut

and oak are very common in Britain.Britons can see  them everywhere from parks and gardens to the

countryside and forests.But  five per cent of Britons could not name the two trees.

     While older people are more likely than younger adults to name Britain's  local trees,the knowledge

is not being passed down.

      Over 70% parents say they have never taught their children the names of  trees nor asked them

about what they may have learnt at school or elsewhere.

     "It is very disappointing to learn that people know very little about British  trees," said one of the

researchers.

1．What does this passage mainly talk about?

A．Many Britons cannot name trees.

B．A scientific survey.

C．Parents should teach their children.

D．People know very little about Britain.

2．How many people could not name any of the common trees if 200 people were surveyed?

A．140    

B．20

C．100  

D．10

3．It can be inferred from the passage that________.

A．the 10 types of Britain's most popular trees can be seen everywhere

B．horse chestnut and oak are two kinds of animals seen everywhere in Britain

C．older people in Britain may know more about the local trees than the younger ones

D．70% of the people questioned can not name the 10 types of Britain's most popular trees

4．The underlined word "common" in the second paragraph probably means________.

A．seldom seen  

B．often seen

C．formal    

D．local

5．This passage may be taken from________.

A．a newspaper    

B．a dictionary

C．a science report  

D．a textbook