阅读理解。 As bananas ripen, the green skin turns yellow gradually. Chemical chan
题型：福建省模拟题难度：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 | |||||||||||||||||||
| 阅读理解。 | |||||||||||||||||||
| On the outside Betsy Lueth"s school looks like any other in Minneapolis. Yet inside, it is Yinghua Academy, a public school where elementary (小学) students study subjects ranging from math to American history in Chinese. Yinghua, the first such immersion (沉浸式) program in the Midwest is on the leading edge of a movement that in recent years has seen Chinese language programs spread rapidly throughout the U.S. The idea behind Yinghua is to introduce kids to the language and culture as early as possible-ideally, before age 12. Kindergarteners and first graders are taught in Chinese and a single period of English is introduced in second grade. By sixth grade, kids are learning half in English and half in Chinese, with the expectation of fluency in both. In Yinghua"s classrooms, the walls are covered not with ABCs but with pictures and Chinese characters. There are many challenges at Yinghua. Most teachers come from Taiwan or mainland China, and cultural misunderstandings are very common. Lueth"s teachers are learning to be tolerant of local customs-as well as a lot more parental input than they are used to. "In China, teachers are respected. They are not questioned," says Luyi Lien, Yinghua"s Taiwan-born director. "In America, parents are more expressive of their opinions." Research has shown that in the long run, immersion programs can provide benefits, including more flexible, creative thinking. Though students from the programs fall behind for a few years in English, by fifth grade they perform as well as or better than their monolingual (单语言) peers on standardized reading and math tests. For multicultural families, the psychological help can also be important. Lueth, a former teacher, co-founded the school as a way to expose her adopted Chinese daughter Lucy to her native culture. Lucy used to be annoyed when cousins asked why her skin color was different from theirs; before she started at Yinghua, she resisted exploring anything related to China Now, Lueth says, Lucy proudly answers her cousins, "Yeah, I was born in China." | |||||||||||||||||||
| 1. Yinghua is different from other schools in Minneapolis in the way that _____. | |||||||||||||||||||
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| A. it offers subjects to students mostly in Chinese B. its language program is popular in the U.S.A. C. kids there begin to learn Chinese at the age of 12 D. its students learn subjects half in English and half in Chinese | |||||||||||||||||||
| 2. One of the challenges at Yinghua is that _____. | |||||||||||||||||||
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| A. most parents do not respect its teachers B. teachers need to get used to the local culture C. its students are mostly from nontraditional families D. there is misunderstanding between teachers and students | |||||||||||||||||||
| 3. We can learn from the last paragraph that immersion program _____. | |||||||||||||||||||
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| A. enables students pass tests more easily B. benefits students in learning psychology C. helps some students accept the local customs D. contributes to the better development of students | |||||||||||||||||||
| 4. Which of the following is TRUE according to the passage? | |||||||||||||||||||
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| A. Teachers in Yinghua have difficulty in understanding the local culture. B. Parents are discouraged to speak out their opinions of the school in Yinghua. C. The students in Yinghua are expected to speak English and Chinese fluently. D. Yinghua is the first school in the U.S.A. to introduce Chinese culture to students. | |||||||||||||||||||
| 阅读理解。 | |||||||||||||||||||
| Though "nanometer" (纳米) is now a fashionable term all over the world, few people know exactly what it is. It has become a new favorite of producers and sellers in recent years. Many "high-tech" products bearing the name "nano" have entered the market, bringing more mysterious feeling to surprised consumers. Nanometer is a very small length unit of measure, and is very small. One millimeter is 1000 micrometers, and one micrometer is 1 000 nanometers. That is, one nanometer is one billionth of a meter. Nano materials are solid materials made up of particles (粒子) or crystallites (晶体) of less than 100 nanometers in size. Then, is a cup made of nano material really any different from an ordinary cup in function as far as how it works? Are nano cups really so wonderful? A reporter went to the Institute of Nanomedicine, which is the first such institute of such a sort in the world and the only one in China, specializing in researching the investigation of the application of nano technology into medicine. A water molecule (分子) is made up of 2 hydrogen atoms and l oxygen atom. It can be changed only by a special way of controlling of the atoms. The material made into the cup can have nanometer particles. But it cannot change the chemical and physical properties of the water contained in the cup. The water in it is still water. When people drink it, it will produce no special effect on human body. Professor Ji who worked in the Institute of Nanomedicine told the reporter, so far, the investigation of nano materials is still limited in the laboratory. No commercial micro products can be produced yet. With the present level of science and technology, the time of everyday goods made of nanometer materials is still years away. The products labeled with nano marks in the market now are only traditional products coated with a thin layer of nanometer material, which makes them more abrasion resistant (耐磨), much easier to be cleaned, or oil resisting or moth proof (防蛀). Professor Ji explained that nano cup is a real cup. It can also be included in the list of nano products in a certain sense. But the nano cup has not changed its property and function as a cup. It is not a magical medicine for curing and health care. | |||||||||||||||||||
| 1. Which of the following shows the right relationship? | |||||||||||||||||||
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| A. nanometer<millimeter<micrometer<meter B. micrometer<millimeter<nanometer<meter C. nanometer<micrometer<millimeter<meter D. millimeter<micrometer<nanometer<meter | |||||||||||||||||||
| 2. It can be inferred from the passage that _____. | |||||||||||||||||||
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| A. nano materials have been put into use in daily goods B. real nano products haven"t become available for people C. the nano cup is very effective in curing and health care D. real nano products are being produced by some companies | |||||||||||||||||||
| 3. The underlined word "properties" in the fourth paragraph probably means _____. | |||||||||||||||||||
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| A. possessions B. qualities C. reactions D. symbols | |||||||||||||||||||
| 4. What would be the best title for the passage? | |||||||||||||||||||
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| A. High-tech Products B. Nano Cups C. Nano Materials D. High-tech Research | |||||||||||||||||||
| 阅读理解。 | |||||||||||||||||||
Research shows that humans switch from selfish to unselfish behaviour when they are watched. Do you?
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