烟草种子萌发的适宜条件是什么？

现有A、B、C、D、E五种强电解质，它们在水中可电离产生下列离子（各种离子不重复）。

阳离子	H+、Na+、A13+、Ag+、Ba2+
阴离子	OH—、C1—、CO32—、NO3—、SO42—

已知：①A、B两溶液呈碱性；C、D、E溶液呈酸性。

②A溶液与E溶液反应既有气体又有沉淀产生；A溶液与C溶液反应只有气体产生（沉淀包括微溶物，下同）。

③D溶液与另外四种溶液反应都能产生沉淀；C只能与D反应产生沉淀。

试回答下列问题：

（1）分别写出下列物质的化学式：A          、B          、E              ；

（2）写出A、E反应的离子方程式：                                     ；

（3）将C溶液逐滴加入等体积、等物质的量浓度的A溶液中，反应后溶液中各种离子浓度由大到小的顺序为：                                  。

（4）已知：NaOH（aq）+HNO₃（aq）=NaNO₃（aq）+H₂O(1);△H =－Q kJ·mol^-1。

写出B与C稀溶液反应的热化学方程式                                     。

（5）在100 mL 0.1 mol·L^-1 E溶液中，逐滴加入40 mL 1.6 mol·L^-1 NaOH溶液，最终得到沉淀物质的量为 

                  mol。

有“仓库”表和“职工”表，检索仓库中基本工资大于3000元的职工姓名和他们所在的仓库名，应该使用的语句是（ ）。

A． 下拉组合框

B． 下拉列表框

C． 下拉文本框

D． 错误设置

阅读理解: 阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项。

The traditional tent cities at festivals such as Glastonbury may never be the same again. In a victory of green business that is certain to appeal to environmentally-aware music-lovers, a design student is to receive financial support to produce eco-friendly tents made of cardboard that can be recycled after the bands and the crowds have gone home.

Major festivals such as Glastonbury throw away some 10,000 abandoned tents at the end of events each year. For his final year project at the University of the West of England, James Dunlop came up with a material that can be recycled. And to cope with the British summer, the cardboard has been made waterproof.

Taking inspiration from a Japanese architect, who has used cardboard to make big buildings including churches, Mr. Dunlop used cardboard material for his tents, which he called Myhabs.

The design won an award at the annual New Designers Exhibition after Mr. Dunlop graduated from his product design degree and he decided to try to turn it into a business

To raise money for the idea, he toured the city’s private companies which fund new business and found a supporter in the finance group Mint. He introduced his idea to four of Mint’s directors and won their support. Mint has committed around £500,000 to MyHabs and taken a share of 30 per cent in Mr. Dunlop’s business. The first Myhabs should be tested at festivals this summer, before being marketed fully next year.

Mr. Dunlop said that the design, which accommodates two people, could have other uses, such as for disaster relief and housing for the London Olympics.

For music events, the cardboard houses will be ordered online and put up at the sites by the Myhabs team before the festival-goers arrive and removed by the company afterwards. They can be personalized and the company will offer reductions on the expense if people agree to sell exterior (外部的) advertising space. 

The biggest festivals attract tens of thousands of participants, with Glastonbury having some 150,000 each year. Altogether there are around 100 annual music festivals where people camp in the UK. The events are becoming increasingly environmentally conscious.

1. “Eco-friendly tents” in paragraph 1 refer to tents _______.

A. economically desirable    B. favorable to the environment

C. for holding music performances1   D. designed for disaster relief

2. Mr. Dunlop established his business        .

A. independently with an interest-free loan from Mint

B. with the approval of the City’s administration

C. in partnership with a finance group

D. with the help of a Japanese architect

3. It is implied in the passage that _______.

A. the weather in the UK is changeable in summer 

B. most performances at British festivals are given in the open air

C. the cardboard tents produced by Mr. Dunlop can be user-tailored

D. cardboard tents can be easily put up and removed by users.

4. The passage is mainly concerned with        .

A. an attempt at developing recyclable tents

B. some efforts at making full use of cardboards

C. an unusual success of a graduation project

D. the effects of using cardboard tents on music festivals

5. Which of the following would be the best title for the text?

A. Don’t Use Tents Again

B. The Advantages of Tents

C. How to Produce Tents

D. The Development of Recyclable Tents

实际操作中遇到端盖、人孔或手孔等法兰密封结构泄漏，无法正常工作时，应（）后，再修复密封锁紧元件再开车。

某高中生的下列行为中，属于参加政治生活的有（）。

①帮助居委会管理社区卫生

②为班级患病同学捐款

③向消费者协会投诉电脑质量问题

④在互联网上参与交通管理问题讨论

A.①②

B.①④

C.②③

D.③④