MODS常见及主要的发病因素有（） A.严重感染和败血症 B.严重创伤 C.各型休克

A habit is any action that we have performed so often that it becomes something we do almost without thinking. Some of them are thought to be bad habits. People spend countless hours and dollars each year trying to drop these bad habits but often fail. Why? Change is hard work and there is no shortcut to achieve it. However, there is still some advice for you to follow.

First, look at why you do it. In other words, what’s the result of doing this thing? If your bad habit is shouting at people when you are unhappy or under pressure, what do you get from it? It may make you feel a little better for the moment. Or maybe you have a bad habit of leaving your homework undone. The result could be that you get more time to spend on the Internet!

Next, take a look on the other hand. What are you losing because of your habit? Shouting at other people is a bad habit because it makes people around you feel bad and unhappy. Leaving your homework undone is a bad habit because you may be punished by your teacher. Having more Internet time means that you are losing the chance to learn the things that you need to learn. When you think that way, you’ll find that it’s not wise to keep your bad habit! Now it is time to make a decision. What will you choose? I’m sure you will choose to do what you think is more important.

小题1:From the first paragraph we know that      .

A．people always fail to break bad habits

B．we must change all the habits we have

C．a habit is a terrible thing we can never change

D．it’s difficult, but we should do something about bad habits小题2:The underlined sentence “there is no shortcut to achieve it” means that      .

A．it is not easy to give up bad habits

B．there is a long way and a short way

C．something dangerous may happen

D．we must cut bad habits in a short time小题3: According to the passage, if you want to drop your habits, you have to      .

A．talk to others when you are in low spirits

B．know why you do what you do

C．finish your homework first

D．spend less time on the Internet小题4:. The main purpose of this passage is to ask us       .

A．not to shout at people when we are sad

B．not to spend much time on the Internet

C．to give up our bad habits

D．to decide what to choose

秦始皇采取的各项措施中，最能体现封建专制主义中央集权本质特征的是：  [ ]

A、推行郡县制 　　

B、皇帝直接任免中央和地方政府的各级官吏

C、制定法制 * * 人民的反抗

D、规定最高统治者称皇帝

直流输电系统为双极电流对称方式运行时，流经接地极系统的电流应小于额定电流的（）。

A.0.01

B.0.02

C.0.03

D.0.04

（16分）

Ⅰ.下列操作正确的是_______.

A．用氨水清洗做过银镜反应的试管

B．用酒精清洗有硫沉淀的试管

C．用碱式滴定管量取20.00 mL 0.1000 mol/L KMnO₄溶液；

D．配制硫酸溶液时，可先在量筒中加入一定体积的水，再在搅拌下慢慢加入浓硫酸E、如果苯酚浓溶液沾到皮肤上，应立即用70℃以上的水清洗

F、不慎将浓碱溶液沾到皮肤上，要立即用大量水冲洗，然后涂上硼酸溶液

G、用托盘天平称取10.50 g干燥的NaCl固体；

H、向沸腾的NaOH稀溶液中滴加FeCl₃饱和溶液，以制备Fe(OH)₃胶体；

I、配制Al₂(SO₄)₃溶液时，加入少量的稀硫酸。

Ⅱ.用下图装置进行SO₂转化为SO₃的转化率测定实验： 

（1）写出圆底烧瓶中发生反应的化学方程式                               

（2）实验前，必须进行的操作是（填操作名称，不必写具体过程）　　 　　　　。

（3）从乙处均匀通入O₂，为使SO₂有较高的转化率，实验时滴入浓硫酸与加热催化剂的先后顺序是                                                。

（4）本实验装置设计中有不恰当的地方，请指出：　　 　                  　　　。

所增加装置的目的是　　 　                  　　　。

（5）将反应生成的44.8L（标况下）SO₂气体全部通过硬质玻璃管后，在右侧烧杯的试管中得到152g固体，则SO₂的转化率为                      

铁路旅客运输日常工作的组织者和指挥者是（）。

A.车站调度

B.客运调度

C.总调度

D.行车调度