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1091．Scientists will produce plastic materials from beans， but right now the new product_____ in the lab．（ ）
发布：2024/11/8 23:0:1组卷：167引用：3难度：0.81092．At the meeting they discussed three different
（approach）to the study of maths．发布：2024/11/8 21:30:1组卷：34引用：3难度：0.41093．One animal which is still alive，but has almost disappeared from the world，is the Chinese river dolphin or Yangtze River dolphin.
The Yangtze River dolphin is a beautiful animal with a graceful body and a long nose.It is blue-grey with a white underside，weighs between 100 and 160 kilogrammes，and can grow up to eight feet long.It lives in the middle and lower parts of the Yangtze River.Most dolphins live in the sea so the Yangtze River dolphin is very unusual.It is one of only five kinds of river dolphins in the world.
In the past，there were many stories about the Yangtze River dolphin.One story said that the dolphin was really a beautiful princess who had drowned in the river.Another said it was a kind of horse that could gallop（急速行进）across water，carrying God on its back.
Sadly，the situation today is very different.Many millions of people live in the Yangtze River Basin and the river is busy，noisy and polluted.The Yangtze River dolphin is almost blind and moves around using sounds.With so many boats and people using the river，the animals cannot find their way around.They are unable to find food，or find each other.Year by year，the number of Yangtze River dolphin in the river becomes smaller and smaller.
A lot of work is being done to help the Yangtze River dolphin.One section of the river has been made into a kind of nature park，where the Yangtze River dolphin can be safe.Fishermen work together with scientists and tell them when they see a Yangtze River dolphin，or if they find an injured one.Injured animals are taken to a research center and nursed back to be healthy.However，in spite of these measures，scientists estimate （估计）that the number of the Yangtze River dolphin still alive in the river may be less than 100.If things continue as they are，the lovely creature will disappear in the next 25 years.
（1）Which of the following cannot be learnt from the passage？
A．The Yangtze River dolphin has already died out from the world.
B．The Yangtze River dolphin is blue-grey with a white underside.
C．The Yangtze River dolphin lives in the middle and lower parts of the Yangtze River.
D．The Yangtze River dolphin is one of only 5 kinds of river dolphins in the world.
（2）The reasons why the Yangtze River dolphin is disappearing don't include.
A．many millions of people live in the Yangtze River Basin，making there noisy and polluted
B．the Yangtze River dolphin is blind because of the pollution and can't find the way around
C．the boats and people are noisy，making the animals cannot find their way around by sounds
D．they are unable to find food or find each other by sounds since the river is noisy
（3）Which of the following is the correct way to save the Yangtze River dolphin？
A．Catch the Yangtze River dolphins and take them to the research center.
B．Make the whole Yangtze River a natural park for the Yangtze River dolphin to live.
C．Make one section of the Yangtze River a natural park where the Yangtze River dolphins can be safe.
D．Ask many people to come to the river to help the Yangtze River dolphins.发布：2024/11/8 18:30:1组卷：5引用：1难度：0.51094．His
（迷惑的） expression suggested that he didn't understand what his teacher said．发布：2024/11/8 16:30:4组卷：32引用：5难度：0.91095．The government has made great efforts to protect the environment， and it has achieved the intended
（目标）．发布：2024/11/8 16:30:4组卷：16引用：4难度：0.71096．The visiting Minister expressed his
（satisfy） with the talks and added that he had enjoyed his stay here．发布：2024/11/8 16:0:2组卷：0引用：2难度：0.71097．The Great Wall of China（1）
（list） in the World Cultural Heritage（世界文化遗产） by UNESCO in 1987．Just（2）a huge dragon，it winds up and down across deserts grasslands and mountains，covering（3）（approximate）6.700 kilometers from the east to the west of China．
In ancient China，many people built walls around their states to protect their land．It was Emperor Qing Shihuang who had the walls（4）（join） up．The project cost much money and hundreds of thousands of people worked on（5）wall．On top of it，it is wide enough for five horses or ten men（6）（walk） side by side．Along the wall are watchtowers，（7）soldiers used to keep watch．With a history of more than 2000 years，some of the sections of the Great Wall are now in ruins or even disappeared．However，it is still one of the most（8）（attract） spots around the world because of its wonderful buildings and historical（9）（important）．Many of the tourists have come to know the famous Chinese saying- "He who does not reach the Great Wall （10）（be） not a true man．"发布：2024/11/8 15:0:1组卷：90引用：5难度：0.51098．Surfing the Internet for fun will make you a better employee，according to an Australian study.
The University of Melbourne study shows that people who use the Internet for their own reasons at work are about 9 percent more productive than those who do not.Study author Brent Coker said， "Surfing the Internet at times helps increase an employee's attention."
"People need to relax for a bit to get back their attention，" Coker said on the university's website. "Having a short break，such as a quick surfing of the Internet，helps the mind to rest itself，leading to a higher total Internet attention for a day's work，and as a result，increases productivity（生产效率），" he said.
According to the study of 300 workers，70 percent of people who use the Internet at work surf the Internet for their own reasons during office hours.Among the most popular surfing activities are searching for information about products，reading online news，playing online games and watching videos. "Firms spend a lot of money on software to block their employees from watching video，using social networking sites or shopping online，" said Coker. "That's not always a good idea."
However，Coker said the study looked at people who surfed the Internet in moderation（适度），or were on the Internet for less than 20 percent of their total time in the office. "Those who spend too much time surfing the Internet will have a lower productivity than those without，" he said.
（1）What does the University of Melbourne study mainly show？
A．People who surf the Internet are good employees.
B．Not everyone surfs the Internet for fun during office hours.
C．Surfing the Internet for fun during office hours increases productivity.
D．The Internet is becoming more and more important in people's life.
（2）According to Paragraph 3，Brent Coker would most probably agree that.
A．the longer a person's mind rests ，the better attention he will have
B．surfing the Internet is the best way to increase productivity
C．workers should have a long break during office hours
D．Workers should let their minds rest now and then
（3）Which of the following is NOT mentioned in the passage as one of the most popular surfing activities？
A．Watching videos.
B．Reading online news.
C．Reading online novels.
D．Playing online games.
（4）What can we infer form the last paragraph？
A．Spending too much time surfing the Internet reduces productivity.
B．Those who never surf the Internet have the lowest productivity.
C．Most people don't surf the Internet in moderation during office hours.
D．People should spend as little time as possible surfing the Internet.发布：2024/11/8 15:0:1组卷：9引用：1难度：0.61099．The dinosaur became
（灭绝的） before the appearance of man.发布：2024/11/8 14:0:1组卷：26引用：3难度：0.91100．Although the medicine can cure you
your illness，it has a bad effect on you．发布：2024/11/8 12:30:2组卷：6引用：3难度：0.7
