American researchers have developed a technique that may become an important tool in fighting AIDS virus from attacking its target-cells in the body's defense system．When AIDS virus enters the blood，it searches for blood cells called T4 lymphocytes(淋巴细胞)．The virus connects to the outside of T4 lymphocytes．Then it forces its way inside．There it directs the cells' genetic material to produce copies of the AIDS virus．This is how AIDS spreads．
Researchers think they may be able to stop AIDS from connecting to T4 ceils．When AIDS virus finds a T4 cell，it actually connects to a part of the cell called CD4 protein．
Researchers want to fool the virus by putting copies or clones of the CD4 protein into the blood．This way the AIDS virus will connect to cloned protein instead of the real ones．Scientists use genetic engineering methods to make the clones．Normally a CD4 protein remains on the T4 cell at all times；the AIDS virus must go to it．
In a new technique，however，the cloned CD4 protein is not connected to a cell．It floats freely，so a lot more can be put into the blood to keep the AIDS virus away from real CD4 protein on T4 cells．One report says the．AIDS virus connects to cloned protein just as effectively as it connects to real protein．That report was based on tests with blood cells grown in labs．The technique is just now beginning to be tested in animals．If successful，it may be tested in humans within a year．
【小题1】The new technique can     .

Here's an amazing way to get a hard-boiled egg into a bottle, even though the mouth of the boiled is smaller than the egg! What's more, you don't even need to touch the egg to get it to go in!

       For this experiment you will need:

·a hard-boiled egg

·a glass bottle with a mouth just slightly smaller than the egg （a fruit-drink bottle works well）

·a 8-cm by 8-cm（3-inch by 3-inch）piece of newspaper

·a match

Remove the shell from the egg．Set the egg on the mouth of the bottle to see that the egg does not fit through the mouth．

       Light the paper．Remove the egg from the mouth of the bottle and drop the burning paper into the bottle．Before the fire goes out, set the egg back onto the mouth of the bottle．Within a few seconds the egg will squeeze（挤）through the mouth and into the bottle．

       As it entered the bottle, the egg may have broken into pieces．This happens when the diameter（直径） of the egg is more than about 0．5 cm（about 3/16 inch） larger than the diameter of the bottle's opening．

       Why does the egg slide into the bottle, even though no one is pushing it? Because the pressure of the air is pushing it．Before the burning paper is put into the bottle, the pressure of the air inside is the same as outside．The burning paper, however, heats the air inside．This causes the air inside to expand．When the egg is placed on top of the bottle, it seals（封住） the bottle．When the fire goes out, the air inside cools．As it cools, the air contracts（紧缩）, and the pressure of the air inside becomes less than the pressure outside．Then, the higher outside pressure pushes the egg into the bottle!

1．The best title of this passage can be _____．

       A．An interesting story                   B．The pressure of the air

       C．Egg in a bottle                        D．Egg, bottle and match

2．What don't you need in this experiment?

       A．Eggs．               B．Water．              C．Bottles．            D．Paper．

3．Why will the egg break into pieces while entering the bottle?

       A．Because of the burning paper．

       B．Because the diameter of the egg is too larger than that of the bottles opening．

       C．Because it is cool inside the bottle．

       D．Because the pressure of the air inside is larger．

4．What is the most important to get the egg into a bottle?

       A．A match．                                         B．A fruit-drink bottle．

       C．The pressure of the air．                    D．The burning paper．

Never argue with one's own understanding.
The whisper of intelligence is always there, whatever you do.
If you create a time lag (隔绝层) between the whisper of intelligence and understanding in you and your action, then you are preventing the brain from growing into a new size. When you argue with intelligence, when you postpone acting according to understanding then there is confusion, the brain gets confused.
The voice of understanding, the voice of intelligence has insecurity about it. How do you know that it is the right thing?
So we tend to ignore it. Instead we accept authority. We obey.
But the brain cannot be orderly, competent, accurate and precise if you do not listen to it, if you have no respect. We are so busy with the outside world and its force that the world that is inside us does not command that respect and reverence (敬重), that care and concern from us.
So one has to be a disciple (信徒) of one's own understanding, and look upon that understanding as the master.
Sometimes one may commit a mistake, it might be the whim (念头) of the ego and we might mistake the whim, the wish of the ego for the voice of silence and intelligence, but that we have to discover. Unless you commit mistakes, how do you learn to discriminate between the false and the true? In learning there is bound to be a little insecurity, a possibility of committing mistakes. Why should one be terribly afraid of committing mistakes?
So instead of accepting the authority of habits and conditionings, while one is moving one watches, and when there is a suggestion, do not neglect, ignore, or insult the whisper from within and from one's own intelligence.
【小题1】What will happen if you refuse to follow your own understanding according to the above passage?

Never argue with one's own understanding.

The whisper of intelligence is always there, whatever you do.

If you create a time lag (隔绝层) between the whisper of intelligence and understanding in you and your action, then you are preventing the brain from growing into a new size. When you argue with intelligence, when you postpone acting according to understanding then there is confusion, the brain gets confused.

The voice of understanding, the voice of intelligence has insecurity about it. How do you know that it is the right thing?

So we tend to ignore it. Instead we accept authority. We obey.

But the brain cannot be orderly, competent, accurate and precise if you do not listen to it, if you have no respect. We are so busy with the outside world and its force that the world that is inside us does not command that respect and reverence (敬重), that care and concern from us.

So one has to be a disciple (信徒) of one's own understanding, and look upon that understanding as the master.

Sometimes one may commit a mistake, it might be the whim (念头) of the ego and we might mistake the whim, the wish of the ego for the voice of silence and intelligence, but that we have to discover. Unless you commit mistakes, how do you learn to discriminate between the false and the true? In learning there is bound to be a little insecurity, a possibility of committing mistakes. Why should one be terribly afraid of committing mistakes?

So instead of accepting the authority of habits and conditionings, while one is moving one watches, and when there is a suggestion, do not neglect, ignore, or insult the whisper from within and from one's own intelligence.

1.What will happen if you refuse to follow your own understanding according to the above passage?

A．Your brain will become smaller.

B．You will never get help from authority.

C．You will hardly know the world.

D．Your own intelligence will stop growing.

2.What is the function of committing mistakes from the view of the author?

A．Mistakes can make one practical.

B．Mistakes can make one know the facts.

C．Mistakes can allow one more time to develop.

D．Mistakes can improve one’s judgment.

3. The whole passage is developed by ______.

A．facts and ideas                         B．reasoning and explaining

C．scientific experiments                    D．arguing and debating

4.The best title of the passage might be ______.

A．Never argue with your own understanding

B．Never believe any authority while arguing

C．Never neglect whispers from around you

D．Never stop training yourself.

Here’s an amazing way to get a hard-boiled egg into a bottle, even though the mouth of the boiled is smaller than the egg! What’s more, you don’t even need to touch the egg to get it to go in!
For this experiment you will need:
·a hard-boiled egg
·a glass bottle with a mouth just slightly smaller than the egg (a fruit-drink bottle works well)
·a 8-cm by 8-cm(3-inch by 3-inch)piece of newspaper
·a match
Remove the shell from the egg. Set the egg on the mouth of the bottle to see that the egg does not fit through the mouth.
Light the paper. Remove the egg from the mouth of the bottle and drop the burning paper into the bottle. Before the fire goes out, set the egg back onto the mouth of the bottle. Within a few seconds the egg will squeeze(挤) through the mouth and into the bottle.
As it entered the bottle, the egg may have broken into pieces. This happens when the diameter(直径) of the egg is more than about 0.5 cm(about 3/16 inch) larger than the diameter of the bottle’s opening.
Why does the egg slide into the bottle, even though no one is pushing it? Because the pressure of the air is pushing it. Before the burning paper is put into the bottle, the pressure of the air inside is the same as outside. The burning paper, however, heats the air inside. This causes the air inside to expand. When the egg is placed on top of the bottle, it seals(封住) the bottle. When the fire goes out, the air inside cools. As it cools, the air contracts(紧缩), and the pressure of the air inside becomes less than the pressure outside. Then, the higher outside pressure pushes the egg into the bottle!
【小题1】The best title of this passage can be      .