题目
题型：期末题难度：来源：
as well: starch (淀粉) changes to sugar; pectin (果胶) breaks down, losing its stiffness; and the flesh softens.
Is ripening fruit a self-contained system, or is the rate of these changes affected by the environment? We
designed the experiment below to see if different atmospheres, produced by different packaging, affected the
rate of ripening. You will vary the atmosphere surrounding unripe bananas and observe the effect on the ripening
process.
| Now set up the bananas in their environments as follows: 1. Put two green bananas in a paper bag and fold the top over to seal out the air. 2. Put one green banana and the very ripe banana in the other paper bag and fold over the top. 3. Put two green bananas in a plastic bag and seal it. 4. Wrap (包) one green banana tightly in a plastic bag. 5. Leave one green banana exposed to the air. |  |
| 1-4: ADBB | |
| 阅读表达。 阅读短文，请根据短文后的要求答题。（请注意问题后的字数要求） | |
| Surgeons in Spain have successfully carried out the world"s first organ transplant (移植) using new stem cell technology. Some people are calling it the greatest medical breakthrough so far this century. But what are stem cells? As we know, most cells in our bodies are designed____ -for example, a liver cell develops to work in the liver and cannot become a heart cell. But stem cells are different. They are very young and in the laboratory scientists can grow them into different types of cells. Claudia Castillo needed a new windpipe (气管) after getting a serious disease. Scientists from the University of Bristol took a donor windpipe, from someone who had recently died. They used strong chemicals to remove the donor"s cells, leaving a tissue scaffold (组 织支架). This was refilled with cells from Ms Castillo"s windpipe and stem cells from her bone. After four days the cells had grown sufficiently for the windpipe to be transplanted into Ms Castillo. Currently, transplant patients have to take drugs for the rest of their lives to prevent their bodies rejecting the new organs. These drugs can have bad side-effects, and do not always prevent rejec tion. But by using Ms Castillo"s own cells, doctors were able to trick her body into thinking the new windpipe was her own organ. Five months on, Claudia Castillo is in perfect health. This ground-breaking procedure could be used in other trans- plant operations in the future. Scientists also believe stem cells might be used to treat Parkinson"s disease, heart disease, stroke, ar thritis, burns and so on. However, stem cell research is extremely controversial. The most effective stem cells do not come from adults but from embryos (胚胎) created in laboratories which are just a few days old. Many people have religious or ethical objections to growing embryos, even if they can be used to cure diseases. | |
| 1. What"s the best title for the passage? ( Please answer within 8 words. ) ______________________________________________________________________________________ 2. Fill in the blank in Paragraph 2 with proper words. ( Please an swer within 8 words. ) ______________________________________________________________________________________ 3. Which sentence in the text is the closest in meaning to the fol lowing one? However, Ms Castillo"s body mistook the new windpipe for her own because doctors put her own cells in it. ______________________________________________________________________________________ 4. What do you think of the stem cell transplant? Why? ( Please answer within 30 words. ) ______________________________________________________________________________________ 5. Translate the underlined sentence in Paragraph 4 into Chinese. _______________________________________________________________________________________ | |
| 阅读理解。 | |
Most sharks are dangerous. The largest kind of sharks-the whale shark-has small teeth and is quite harmless | |
| 1. The shark that is least dangerous to man is the _______. | |
| A. white shark B. whale shark C. tiger shark D. hammerhead shark | |
| 2. This story tells you that sharks are usually ________. | |
| A. friendly B. small C. afraid of people D. dangerous | |
| 3. After the Australian fisherman found he had caught a shark, he was ________. | |
| A. surprised B. frightened C. unhappy D. angry | |
| 4. This story tells you that the best way to handle sharks is to ________. | |
| A. hit them with your fist B. keep far away from them C. splash water D. wrestle with them | |
| 5. The passage mainly tells us something ________. | |
| A. about fishing sharks B. about sharks C. how to eat sharks D. that sharks are man"s enemies | |
| 语法填空。 | |
| Many people believe that they 1 (suppose) to drink eight glasses of water 2 day, or about two liters. Why? Because that is 3 they have been told all their lives. 4 a new report offers some different advice. The experts say people should obey their bodies; they should drink as 5 water as they feel like drinking. The report contains some general 6 (suggest). The experts say that women should get about 2.7 liters of water 7 (day). Men should get about 3.7 liters. But wait in each case, that is more than eight glasses. There is an important difference. The report does not tell people how many glasses of water to drink. 8 fact, the experts say that 9 may be impossible to know how many glasses are needed to meet these guidelines. This is because the daily requirement can include the water 10 (contain) in foods. | |
| 阅读理解。 | |
| We live in a digital world now, and a student"s technology needs have changed. For the early years, say when you are in primary school, you can get by with no technology at all. Even if you have a computer, it"s a good idea to get children familiar with libraries. At this age, trips to the library are like family outings. As you get closer to middle school, a computer with Internet access becomes more of a necessity. Teachers will often give assignments that require a student to use the Internet for research. After a computer, technology choices for students become more difficult to make - especially when it comes to cellphones. Kids will beg their parents for a cell-phone, especially in middle school. For many parents, it"s a safety issue: They want to know that their kids can reach them quickly if necessary. For teachers, cell phones can be used to record lessons when students are absent. But many teachers dislike cell-phones. Some kids send messages or have talks in the class. Sending messages also raises the problem of cheating on exams. More and more schools are now forbidding the use of cellphones. Many kids see iPods as necessary things to have. iPods are great for music, but do they do anything good for your children"s education? Maybe they do. That"s the opinion of Doug Johnson, an educator for 30 years. Johnson says that educators should accept all new forms of technology in the classroom, including iPods. "Some do more with their cell- phones than we can do with our laptops," he jokes."I don"t think we should be afraid. The truth is that it"s easier to change the way we teach than to change the technology habits of an entire generation." | |
| 1. According to author, primary school children should _____. | |
| A. use the computer and the Internet regularly B. ask their parents to buy them cell-phones C. buy iPods to listen to music D. go to libraries to read more books | |
| 2. Why do parents agree to buy their children cell-phones? | |
| A. They want their children to be cool. B. They think cell-phones be helpful to their study. C. They want to keep in touch with their children. D. They want their children to keep up to date. | |
| 3. The following are all reasons why many teachers dislike cell-phones EXCEPT ______. | |
| A. cell-phones can be used to cheat on exams B. schoolchildren will send messages during class C. cell-phones can be used to record lessons D. schoolchildren might talk on them during class | |
| 4. What does the underlined word "that" refers to? | |
| A. iPods can be used to listen to music. B. iPods can be helpful for children"s education. C. iPods can be used to play games. D. iPods are necessary for children"s lives. | |
| 5. We can infer from what Doug Johnson said that _______. | |
| A. cell-phones are not useful to students B. teachers should let students use cell-phones C. it"s better for teachers to change their teaching methods D. schoolchildren should follow the trends(潮流) of fashion | |
| 阅读理解。 | |
| One of the founding fathers of the internet has predicted the end of traditional television. Vint Serf, who helped to build the internet while working as a researcher in America, said that television was approaching its "iPod moment." In the same way that people now download their favorite music onto their iPods, he said that viewers would soon be downloading most of their favorite programmers onto their computers. "85 percent of all video we watch is pre-recorded, so you can set your system to download it at any time," said Mr. Cerf, who is now the vice-president of Goggle. "You"re still going to need live television for certain things--like news, sporting events and emergencies- but increasingly it will be almost like iPod, where you download content to look at later." Although television-on-demand has not yet become a main activity in the UK, the BBC, 1TV and Channel 4 have all invested a lot of money in technology which Mr. Cerf think will enable viewers to watch their favorite shows on their computers. However, some critics (批评家) have warned that the Internet will collapse (崩溃) if millions of people try to download programmers at the same time. Over the next four years, scientists think the number of videos watched over the Internet will double, with people moving from short chips to hour-long programmes. Broadband companies claim that the service will cause "traffic jams", which will cost millions of pounds to solve. Mr. Cerf dismissed these warnings, saying that critics had predicted 20 years ago that the net would collapse when people all around the world started to use it at the same time, "We"re far from exhausting (用 尽) the capacity," he said. "I want every one of the six billion people in the planet to be able to connect to the Internet." | |
| 1. Vint Cerf is all the following EXCEPT that _____. | |
| A. a researcher in the United States B. the vice-president of Goggle C. one of the founders of the Internet D. a manager of a broadband company | |
| 2. Which of the following is NOT something Vint Cerf has predicted? | |
| A. Traditional television will soon have its iPod moment. B. The number of videos watched over the Internet will double. C. Viewers will be able to download TV programmers onto their iPods. D. Viewers will be able to watch their favorite TV shows on the Internet. | |
| 3. According to the passage, people can always do all the following EXCEPT _____. | |
| A. watch short clips over the Internet B. download live TV over the Internet C. download per-recorded videos over the Internet D. listen to their favorite music on their computers | |
| 4. Some critics are now predicting _____. | |
| A. the Internet will collapse if millions of people use it at the same time B. people all over the world will be able to connect to the Internet C. the Internet will crash if too many people download TV programmes at the same time D. the videos people watch over the Internet | |
| 5. This passage mainly tells us _____. | |
| A. a Goggle expert is predicting the end of traditional television B. the Internet will never be used to download people"s favourite shows C. the Internet will become more popular D. something about Vint Cerf |