使局部麻醉药与组织表面的神经末梢直接接触，让其失去疼觉，主要用于口、鼻、 * * 、直肠、

关于结节病描述正确的是（）

 

A.大多数病例愈后良好，少数进展为肺纤维化

B.单侧肺门淋巴结增大约占所有病例的1/2

C.纵隔淋巴结一般不压迫大血管

D.纵隔淋巴结可发生蛋壳样钙化

E.器官受累的数量与愈后无关

[化学与技术]工业上可以利用氟硅酸、碳酸氢铵制备冰晶石（Na₃AlF₆），其工艺如下：

请回答下列问题：

（1）反应①中生成的无色气体A是______，滤液①的溶质是______．

（2）经测定NH₄HCO₃溶液呈中性，请分析原因（用离子方程式和文字表述说明理由）______．

（3）经反应②后，过滤得到的冰晶（Na₃AlF₆）固体，该固体上附着有杂质，需要洗涤，请简述如何证明冰晶石固体已经洗涤干净______．

（4）温度和NH₄HCO₃浓度会影响反应①的速率．现设计如下实验方案探究温度和NH₄HCO₃浓

度对反应①速率的影响．请在表格空白处填写适当的反应条件．

实验编号	实验目的	温度	c（NH4HCO3）
I	为以下实验作参照	60℃	c1
II	探究浓度对反应①速率的影响		c2
III	探究温度对反应①速率的影响	80℃

（5）下图是滤液①溶质的质量分数随温度变化的曲线图：

请分析t₂℃时，滤液①中溶质的质量分数下降的原因是______．

对于生命过程来说，椰子中的主要部分是[ ]

A．椰子的种皮

B．椰子汁

C．椰子肉

D．椰子的胚

阅读理解。

     Hightech machines have made life easier for millions around the world. However, some people

still prefer lowtech ways of doing things. Here's an example of why this is happening. You can

microwave a frozen hamburger in 60 seconds. However, it won't taste as good as the one you cook

on the stove. And if you're in that much of a hurry, you probably won't take time to toast the bun.  

Hightech cooking saves time, but it doesn't make bettertasting meals.

     Most people get their news from hightech sources like television or the Internet. This has many

advantages. For example, electronic news is more up to date than newspapers or magazines. It's also

more exciting to see live and videotaped news events than photographs. However, newspapers and

magazines have some important advantages. They give more background and details. They also let

you read the parts that are important to you and skip the rest.

     Other hightech timesavers have similar disadvantages. For example, most people use the phone

or email to stay in touch with friends and family members who live in other places. But when you use

the Internet or the phone, you don't always think carefully about what you are saying, and sometimes

you forget the important things you want to communicate. Similarly, when you wordprocess a

homework assignment instead of handwriting it, you can check your spelling electronically and put in

fancy headings.  However, some students are so busy with the computer that they don't pay enough

attention to the actual words they are writing.

1. Which of the following statements is TRUE according to the passage?

A. The writer likes hightech cooking.

B. Lowtech cooking produces bettertasting meals.

C. Hightech news programs always keep you reading what is important to you.

D. Handwritten homework is better than wordprocessed homework.

2. How does the writer feel about hightech tool?  

A. Better late than never.

B. Easy come, easy go.

C. Every coin has two sides.

D. Learn to walk before you run.

3. What is the main subject discussed in the text?

A. Hightech vs lowtech.

B. Advantages vs disadvantages.

C. Newspapers and magazines vs television and the Internet.

D. Wordprocessing vs handwriting.

4. How is the text organized?  

A. Main idea-Argument-Explanation.

B. Opinion-Discussion-Description.

C. Topic-Comparison-Supporting examples.

D. Introduction-Supporting examples-Discussion.

设函数中有整型变量n，为保证其在未赋初值的情况下初值为0，应选择的存储类别是( )。

A．auto
B．register
C．static
D．auto或register