It seems that electronic devices just keep getting smaller. Scientists in the United States have announced the creation of the first transistor with only two dimensions（二维）.
A transistor is a small electronic device that transfers or carries electronic current. Scientists hope these new 2D transistors will be used for building high-resolution（高分辨率）displays that need very little energy.
Two groups of scientists created these 2D transistors. They report that the transistors are only a few atoms thick.
Usually transistors are made with the element silicon（硅）. Computer processors, memory chips, TV screens and other electronic devices contain billions of silicon-based transistors. But these very small electrical parts have certain limitations.
Dimitris Ioannou is an electrical engineering professor at George Mason University. He says the traditional transistor has been improved as much as it can be.He adds that researchers have been looking for new materials with special features and they want transistors to be seen through and soft.
“If the layers are very thin, the transistor can become flexible, so it doesn't have to be rigid（坚硬的）, like it would be in a silicon chip. So people can think of applications like wearable electronics, television screens and other things,” said Ioannou.
These new transistors can also carry higher current. They also can move the current much faster than traditional transistors. This is important for high-definition screens.
Dimitris Ioannou says the scientific success could prove very useful in the future. "Now, how good and how useful it will be, it's still in the stage of research, but it certainly is an advance," said Ioannou.
1.Which of the following statements about the newly created transistor is TRUE?
A. They are expected to be used in high-resolution displays.
B. The transistors are made with the element silicon.
C. They are rigid, just like traditional transistors.
D. They have already been put into actual use.
2.What does the underlined sentence in Paragraph 5 mean?
A. The traditional transistors have been changed into two-dimensional ones.
B. Many of the traditional transistors have been improved over the years.
C. The traditional transistor has been developed to its fullest.
D. The traditional transistor has been developed quite well.
3.What is Dimitris Ioannou's attitude towards the creation of the new transistors?
A. Negative. B. Neutral.
C. Indifferent. D. Positive.
2010年4月14日7:49青海玉树地区玉树发生地震。
基本情况:
1. 为当地有历史记录以来最强烈的地震
2. 很多人正在睡觉；居民住房大量倒塌；水电供应中断；学校、医院严重损毁
3. 有2, 698人遇难，270人失踪，12, 000多人受伤
4. 政府十分关心灾情，表示要尽一切可能帮助灾区人民重建家园。
参考词汇: 当地的 local
注意:词数:100左右。
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完成句子
1.Are you afraid that your friend would laugh at you, or would not understand what you are ______ _______?
2.So by the 1600’s Shakespeare was able to ______ ______ ______ a wider vocabulary than ever before.
3.Once she has ______ ______ ______ ______, nothing can change it. Finally, I had to give in.
4.But the one million people of the city, who ______ ______ ______these events, were asleep as usual that night.
5.I felt bad ______ ______ ______ I talked to a group.
单词拼写
1.You have to get ________ (官方) permission to set up a new clinic in this community.
2.I tried to tell her but she ________ (不理睬) me.
3.The sports meet held in our school last week was well ________ (组织).
4.I’m ________ (极其) sorry for the delay.
5.Thousands of houses were ________ (破坏) in the horrible earthquake.
6.She was ________ (决心) to improve her spoken English.
7.Tom ________(辨认出) her voice the moment he answered the phone.
8.It’s not ________ (可靠的) to judge a man only by his looks.
9.He went on ________ (攻击) her until other passengers arrived and told him to stop.
10.Research and teaching are of ________ (相等的) importance.
A woman professor was giving a lesson to her students on stress management. As she raised a glass of water, everyone in the class ____ they would be asked the “half-empty or half-full” question. ____, with a smile on her face, she asked the students, “How ____ do you think this glass of water weighs?”
Answers called out ranged from 100ml to 300ml.
She quieted the students down and then replied, “It does not ____ on the absolute weight. It ____ on how long you hold it. If I hold it for a minute, it is OK. If I hold it for an hour, I will have an ache in my right ____. If I hold it for a day, my arm will feel numb. In each case, the ____ of the glass of water doesn't change, but the ____ I hold it, the heavier it becomes. Why?”
Lost in ____, all the students kept silent and listened to the professor carefully.
“Our stresses and ____ in life are like that glass of water. If we ____ our burdens all the time, sooner or later, we will feel exhausted, even ____ to carry on.” ____ you have to do is put all your burdens down as ____ in the evening as possible. Don’t carry ____ through the evening into the night; by doing this，we can get ____ next morning and are able to move forward. More ____ than not, life gets terrible when we think too much. And the moment you ____ your burdens, you’ll find yourself feeling so much more relaxed.
So rather than being upset and feeling ____ for yourself, start doing something about it.____, life is too short to abandon yourself to anything that is not making you happy.
1.A.wondered B.agreed C.expected D.argued
2.A.Instead B.Meanwhile C.Anyhow D.Therefore
3.A.full B.little C.heavy D.much
4.A.influence B.matter C.change D.increase
5.A.holds B.calls C.takes D.depends
6.A.finger B.foot C.arm D.leg
7.A.shape B.function C.size D.weight
8.A.better B.longer C.deeper D.further
9.A.thought B.idea C.plan D.class
10.A.doubts B.joys C.worries D.surprises
11.A.carry B.cover C.hide D.show
12.A.uncertain B.unhappy C.unfair D.unable
13.A.What B.That C.Whether D.How
14.A.late B.early C.soon D.fast
15.A.this B.that C.them D.it
16.A.reset B.reviewed C.refreshed D.reminded
17.A.usually B.commonly C.ordinarily D.often
18.A.catch up with B.let go of C.put up with D.take care of
19.A.sorry B.satisfied C.happy D.confused
20.A.In a word B.After all C.However D.Besides
If you feel depressed (消沉的), it’s best to do something about it—depression doesn’t just go away on its own. In addition to getting help from a doctor, here are four things you can do to feel better.
Exercise. Take a 15-to-30-minute walk every day—or dance and bike if you prefer.1.But make yourself do it anyway. Once you get in the exercise habit, it won’t take long to notice a difference in your mood.
Provide yourself with good nutrition. Depression can affect appetite (食欲). One person may not feel like eating at all, but another might overeat.2.So eat plenty of fruits and vegetables and get regular meals (even if you don’t feel hungry, try to eat something light, like a piece of fruit, to keep you going).
Find out troubles. 3.When you know what’s got you feeling blue and why, talk about it with a caring friend. Talking is a way to receive some understanding. If there’s no one to tell, pouring your heart out to a journal works just as well.
4.Depression affects a person’s thoughts, making everything seem unhappy and hopeless. If depression has you noticing only the negative, make an effort to notice the good things in life. Try to notice one thing, and then try to think of one more. Consider your strengths or gifts.
Most of all, don’t forget to be patient with yourself. 5.
A. Look on the bright side.
B. Take action to solve problems.
C. Depression takes time to heal.
D. Proper nutrition can affect a person’s mood and energy.
E. People who are depressed may not feel much like being active.
F. Try to make out any situations that have contributed to your depression.
G. With depression, a person’s creativity and sense of fun may seem blocked.
