No matter how many times Mike says it was an accident, I believe he tried to knock me down.
A. voluntarily B. deliberately
C. randomly D. Cautiously
高三英语单项填空中等难度题
No matter how many times Mike says it was an accident, I believe he tried to knock me down.
A. voluntarily B. deliberately
C. randomly D. Cautiously
高三英语单项填空中等难度题查看答案及解析
Look closely at ,your hands-are they clean? It doesn't matter how many times you was your hands. They're still crowded with microbes, which are also called "germs" or "bacteria". Microbes are everywhere. But don't worry-most microbes don't harm you. and many actually help you stay alive.
Now, scientists say the microbes that live on our hands could be used in a surprising way: fighting crime.
When police visit the scene of a crime, they often look for fingerprints to try to identifythe criminal. But according to a recent study, investigators could even use microbes to help break a criminal case.
Every person has his or her own set of microbes that live on their hands, according to scientists at,the University of:Colorado. That means the mix of different kinds of microbes on everybody's hand is unique-much like one's fingerprint.
The scientists wanted to know whether this microbe mix could be used as a new kind of fingerprint-especially in a crime scene where fingerprints might be hard to find. And policemen use forensics such as studying fingerprints to identify the criminal.
"Microbe fingerprints are harder to hide," said Noah Fierer, one of the scientists.
"You can't sterilize(为……杀菌) a surface just by wiping it off. "
His team compared the bacteria on the hands of 273 people with the bacteria found on each person's computer keyboard. For the study, the keyboards had been used only by the people who were being tested. The study showed that the mix of microbes from each per- son's hands matched the mix of microbes on that person's keyboard. The scientists were easily able to tell the 273 people apart-just by looking at their keyboards.
But there are a lot more than 273 criminals. Other scientists wonder whetherthe microbe fingerprint can really be that useful.
Fierer agrees that scientists have a lot more work to do before the microbe fingerprint will be a useful tool．
1.According to the passage, microbes on people's hands_____
A．do more harm than good B．are easy to get rid of
C．are almost the same D．might help find crimes
2.The underlined word "forensics" in Paragraph 5 probably refers to________.
A．the scientific test used by police
B．a new kind of fingerprint
C．a kind of bacteria'in people's hands
D．a kind of newly invented keyboard
3.What did Fierer's team find through the study?
A．They found the criminal among the 237 people.
B．They could tell who had used which computer.
C．Computer keyboards couldn't keep people's microbe fingerprints.
D．People's characters could be identified by the keyboards they used.
4.We can learn from the passage that ______.
A．your microbes may give you away
B．scientists will come to a clear conclusion soon
C．many scientists think microbe fingerprints useless
D．the microbe fingerprint has been used in many cases
5.The main idea of the passage is about_____.
A．the importance of fingerprints B．how to clean our hands
C．the usefulness of microbes D．different germs on our hands
高三英语阅读理解中等难度题查看答案及解析
It doesn’t matter how many times you fail；_________ matters is how many times you stand up and try again．
A．which B．that C．who D．what
高三英语单项填空中等难度题查看答案及解析
It doesn’t matter how many times you fail；_________ matters is how many times you stand up and try again．
A．which B．that C．who D．what
高三英语单项填空中等难度题查看答案及解析
It doesn’t matter how many times you fail；_________ matters is how many times you stand up and try again．
A．which B．that C．who D．what
高三英语单项填空中等难度题查看答案及解析
No matter ______ the CRH accident in Wenzhou, it had and will have much warning significance.
A. how the investigators said caused
B. what the investigators said caused
C. why the investigators said caused
D. the investigators said how caused
高三英语单项填空中等难度题查看答案及解析
No matter how bright a talker you are, there are times when it’s better _____ silent.
| A．remain | B．be remaining | C．having remained | D．to remain |
高三英语单项填空中等难度题查看答案及解析
(2012·浙江高考)No matter how bright a talker you are, there are times when it's better ________ silent.
A．remain B．be remaining
C．having remained D．to remain
高三英语单项填空中等难度题查看答案及解析
It was no surprise that an awful accident ____ occur the day when they were drunk．
A．does B．did C．has to D．had to
高三英语单项填空中等难度题查看答案及解析
For people, many other animals, family matters. Consider how many jobs go to relatives. Or how an ant will cruelly attack intruder (入侵的) ants but rescue injured, closely related nest-mates. There are good evolutionary reasons to aid relatives, after all. Now, it seems, family feelings may stir in plants as well.
A Canadian biologist planted the seed of the idea more than a decade ago, but many plant biologists regarded it as heretical-plants lack the nervous systems that enable animals to recognize kin (家族), so how can they know their relatives? But with a series of recent findings, the belief that plants really do care for their most genetically close peers-in a quiet, planty way-is taking root. Some species control how far their roots spread, others change how many flowers they produce, and a few tilt (倾斜) or shift their leaves to minimize shading of neighboring plants, favoring related individuals.
“We need to recognize that plants not only sense whether it’s light or dark or if they’ve been touched, but also whom they are interacting with,” says Susan Dudley, a plant evolutionary ecologist, whose early plant kin recognition studies sparked the interest of many scientists.
Beyond broadening views of plant behavior, the new work may have a practical side. In September 2018, a team in China reported that rice planted with kin grows better, a finding that suggested family ties can be used to improve crop yields. “It seems anytime anyone looks for it, they find a kin effect,” says Andre Kessler, a chemical ecologist at Cornell University.
1.Why are ants mentioned in the first paragraph?
A.To show how cruel ants are to their enemies.
B.To lay foundation for the idea of plants’ family feelings.
C.To introduce the topic of how family matters to animals.
D.To explain why people usually give more jobs to their relatives.
2.Which of the following can best replace the underlined word “heretical” in paragraph 2?
A.Indescribable. B.Understandable. C.Impossible. D.Traditional.
3.What may be the plants’ way of expressing their care for relatives?
A.They stop producing flowers to avoid competition.
B.They spread their roots far so as to protect their peers.
C.They care for their injured peers by silently taking roots.
D.They move their leaves to share sunlight with their close peers.
4.What can be inferred from the text?
A.Different plants mustn’t be planted together.
B.Corn planted with corn can produce more than that with rice.
C.China has put the idea into wide practice and achieved great success.
D.The closer rice is planted with their relatives the more they will produce.
高三英语阅读理解困难题查看答案及解析