The scientists have already the secret of the universe.
A. found B. looked for C. discovered D. seen
九年级英语单选题困难题
The scientists have already the secret of the universe.
A. found B. looked for C. discovered D. seen
九年级英语单选题困难题查看答案及解析
A group of scientists from Sweden have unlocked one of nature's biggest secrets. The scientists have worked out how spiders make such strong silk when they build their webs. The silk that spiders make is strong and even tougher than steel. Being able to produce man-made spider silk has long been a dream of many scientists. Now, researchers from the Swedish University of Agricultural Sciences have, step by step, developed a method that works. They've found that the materials for webs arc in a spider's silk gland (丝腺) as protein. The gland has a level of acidity (酸度) that helps make the protein into very strong silk. The researchers reported that they could produce man-made spider silk by copying the process.
The new man-made silk could be very useful to humans. Doctors are interested in it. They think it can help people get well after a bum. Some doctors believe the new silk could be used to take the place of the torn ligaments (撕裂的韧带) in the body. Plane makers and makers of protective clothing also see many uses for the new silk.
Senior researcher Anna Rising spoke about how ▲ the new discovery could be. She said, "This is the first successful example of copying spider silk-making process. In the future, this may allow industrial production of man-made silk, which can be used in many fields and make our life much better. The silk could become a valuable material for us."
1.The man-made silk can be used (o do many things EXCEPT .
A.help patients get well B.build excellent planes
C.stop ligaments being torn D.make protective clothing
2.Which of the following can be put in ▲ ?
A.simple B.important C.awful D.boring
3.According to Anna Rising, the new material .
A.will improve our life a lot B.can help fight air pollution
C.will take the place of many other materials D.can help us make more scientific discoveries
4.What's the best title for the passage?
A.Spider silk is good for humans B.Scientists from Sweden are great
C.Making spider silk is now possible D.Making scientific discoveries is hard
九年级英语阅读单选中等难度题查看答案及解析
One day, a young man asked Albert Einstein, the great German scientist, which the secret of success was. The scientist41_him that the secret of success is hard work. A few days 42____the young man asked him the43question again. Einstein was very44. He did not say45, but wrote a few46on a piece of paper and handed it to the young man. The young man looked47the piece of paper. On it was written: A=X+Y+Z.“What48this mean?”asked the young man.“A means success,” said the old scientist.“X means hard work, Y means good methods, and Z means49talking and start to50.
1.A. told B. said C. talked
2.A. ago B. before C. later
3.A. easy B. good C. same
4.A. worried B. happy C. angry
5.A. anything B. something C. nothing
6.A. words B. sentence C. word
7.A. on B. up C. down
8.A. will B. shall C. does
9.A. go on B. stop C. enjoy
10.A. work B. read C. write
九年级英语完型填空困难题查看答案及解析
Have you ever wondered about the secret life of the tasty lobster(龙虾)? In the sea, it is yellow, orange, grey, green, brown or even blue. Cooking turns it red. Lobsters are nocturnal creatures(夜行物), so it is best to hunt(捕捉) them at night when they are active. You can catch lobster by hand, but you should wear thick gloves because lobster’s claws are strong. A very large lobster could cut your finger. Interestingly, in the past, lobsters were only served to prisoners as they were considered as a poor man’s food. Nowadays, lobsters are an expensive and popular dish.
1.What color is the lobster when cooked?
A. Blue B. Red
C. Yellow D. Green
2.When is the best time to hunt the lobster?
A. In the morning B. In the afternoon
C. At noon D. At night
3.Can people catch the lobster by hand without thick gloves?
A. Yes, they can B. No, they can’t
C. Not mentioned D. No answer is right
九年级英语阅读单选简单题查看答案及解析
Have you ever wondered about the secret life of the tasty lobster(龙虾)？In the sea, it is yellow, orange,grey,green, brown or even blue. Cooking turns it red.
Lobsters are nocturnal creatures(夜行物)，so it is best to hunt(捕捉) them at night when they are active. You can catch lobster by hand, but you should wear thick gloves because lobster’s claws are strong. A very large lobster could break your finger.
Interestingly, in the past, lobsters were only served to prisoners as they were considered as a poor man’s food. Nowadays, lobsters are an expensive and popular dish.
1.What color is the lobster when cooked?
A. Blue B. Red C. Yellow
2.When is the best time to hunt the lobster?
A. In the morning B. In the afternoon C. At night
3.Can people catch the lobster by hand?
A. Yes, they can B. No, they can’t C. Not mentioned
4.What is interesting about the lobster?
A. The lobster is colorful in the sea.
B. The lobster is active during the night.
C. People seldom considered the lobster as good dish in the past.
九年级英语阅读单选中等难度题查看答案及解析
The secret of happiness is to treasure the things you have now. But someone won’t know it _______ they lost what they own.
A. if B. while C. since D. until
九年级英语单项填空中等难度题查看答案及解析
1.The student of Class Three have already cleaned their classroom.( 改为否定句)
The student of Class Three ______ cleaned their classroom .
2. Her grandfather has been dead since2007 .（对画线部分提问）
________ ______ has her grandfather been dead?
3.The film began about 20 minutes ago．You are late．(改为同义句)
The film has ________ ________ for about 20 minutes．You are late.
4.我们应该循环利用塑料袋而不是扔掉它们。(完成译句)
We should reuse plastic bags throwing them away.
九年级英语句型转换简单题查看答案及解析
—The scientists have found a lot of new evidence of the black hole.
—But not everyone agrees with the results of the .
A.notice B.message C.research D.information
九年级英语单选题简单题查看答案及解析
Summer holiday is 1.(come). The kids have already 2.(make) great plans for the summer. Some of them will travel abroad.3. example, Guo Yuan will spend his holiday far away from his parents. He will visit Australia 4. some friends. Some kids will keep 5.(study) hard during the summer holiday. They have to 6.(go) to many after-school classes. Their 7. (parent) think this is good for their future studies. But the students 8.(them) don’t like it. Some will stay at home and do 9. same things as usual, like reading books and 10.(watch) TV. What is your plan for the summer vacation?
九年级英语短文填空困难题查看答案及解析
I’m the engine that keeps you working, and I’m here to share some of my secrets. I have 100 billion nerve cells(神经细胞), so you need to consider before you blame(责怪) me for not being so fast enough. It’s not really my fault: information travels through me too fast and sometimes I can’t keep all of it.
The Internet is making me weak. A study found that you’ve been relying more on the Internet. That means I’m going to forget more over time. Scientists have been worried that our ability to think is being lost.
In general, I’m about ten percent larger in men than women. It doesn’t make men smarter. It just lets me control their different bodies. Actually, it’s more common for women to get angry, but men can’t focus on a thing well. They usually have language difficulties.
Your mobile phone scares me. A new study showed that more than one hour of mobile phone use can get me in trouble. Mobile phone radiation(辐射) might cause me to be in a worse situation.
Some parts of me never sleep. It’s important for you to get a good night’s sleep. Sleep helps to improve memories. In fact, when you are asleep, some parts of me are still working hard on my duty. Besides, laughter is really the best medicine for me. So remember to laugh more for my better situation.
1.What’s the result of depending too much on the Internet?
A.It will make people remember things for a long time.
B.It helps people to remember things more easily.
C.It may influence one’s way of thinking.
D.It may make us have the ability to learn.
2.Why can’t I keep all the information?
A.Because there is too much information.
B.Because information travels too fast.
C.Because I can hardly work.
D.Because I am lazy.
3.What can you do to make “me” work better?
A.Get a shorter sleep every night.
B.Blame “me” for not being fast enough.
C.Use “me” more instead of the Internet.
D.Use a mobile phone for one hour each day.
4.What can we know from the passage?
A.Men can pay close attention to a thing.
B.At night, “I” can completely sleep and stop working.
C.It’s clear that “I” should take medicine to work better.
D.Mobile phone radiation may bring serious problems to “me”.
九年级英语阅读单选中等难度题查看答案及解析