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1、英语周报18期unit18答案
2、英语周报第3628期B版30期
3、2023至2022初一英语周报18期图片
17．Can you imagine a world without chocolate？It's not something I'd 1ike to do．so I was relieved to read that there's a university with a programme to safeguard the future of chocolate!
The University of Reading，in England，has just opened a new clearing house for all the world's new cocoa varieties．They must be quarantined（隔离检疫）before they can be grown．Why？Cocoa production hit a record high of 4.4million tons last year but about 30%of the precious crop is regularly lost to pests and diseases．Now we don't want that，do we？
Demand for chocolate has been increasing faster than the world supply of cocoa and researchers think that new varieties are key to solving this problem．
The University of Reading has been protecting the quality of the new crops since 1985，after it took over the task from the Royal Botanical Gardens in Kew，London．And it has improved its facilities．The leader of the institution's cocoa project，Professor Paul Hadley，says，"One of the main issues concerning cocoa improvement is the supply of reliably clean，healthy，interesting cocoa material．"
The cocoa centre has a collection of 400plant varieties and their greenhouse uses a lot of energy to keep them in tropical conditions．After up to two years in quarantine，clean and safe seeds are sent to some 20countries，including several in West Africa．That's where 75%of the cocoa used for chocolate worldwide comes from．The crop is extremely important for the local economy：it employs about two million people．
Professor Hadley says he works with a small team of skilled technicians who look after the collection．And more of us seem to count on them now．
The scientist says，"there is some concern within the industry that demand is increasing constantly，particularly in countries like China，where the standard of living is increasing and people are getting a taste for different chocolates．"
24．What is the text mainly about？A
A．Safeguarding cocoa seeds．
B．Planting cocoa worldwide．
C．Keeping cocoa in greenhouse．
D．Finding the new market for cocoa．
25．The institution's cocoa project is toC．
A．have cocoa skin removed
B．offer more jobs to people
C．ensure the quality of cocoa
D．supply cocoa for two million people
26．What does the last paragraph tell us？B
A．The taste of chocolates is changing．
B．Demand for cocoa is increasing fast．
C．People are concerned about cocoa varieties．
D．Chinese have a long history of eating chocolates．
27．What's the purpose of the text？D
A．To educate． B．To advertise． C．To warn． D．To inform． 试题答案
分析 本文是一篇记叙文，介绍了一所英国的大学研究的一个关于巧克力的项目．他们通过研究捍卫者巧克力的种子，并且培育出了很多不同口味的巧克力，而在未来的世界里巧克力也永远不会消失．
解答 ACBD
24 A．推理判断题．根据第一段so I was relieved to read that there's a university with a program me to safeguard the future of chocolate可知我在读了一份项目以后感到如释重负，由此可推断作者接下来就要介绍有关这个项目的内容，故选A．
25 C．推理判断题．根据第三段The University of Reading has been protecting the quality of the new crops since 1985，after it took over the task from the Royal Botanical Gardens in Kew，London可知这所大学在接管这个项目以后，就很注重保护新农作物的质量，故选C．
26 B．句意理解题．根据最后一段there is some concern within the industry that demand is increasing constantly可知现在的担忧是需求量一直在持续增加，故选B．
27 D．推理判断题．根据对全文大意的把握可知整篇文章都在报道阐述关于The University of Reading接管的与巧克力种植有关的内容，并没有涉及到教育信息，或者打广告，或者警告，故选D．
点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余项。（说明：E请填涂AB；F填涂CD；G填涂ABC）
Before going outside in the morning, many of us check a window thermometer (温度计) for the temperature. This helps us decide what to wear.
1. . We want our food to be a certain coldness in the refrigerator. We want it a certain hotness in the oven. If we don’t feel well, we use a thermometer to see if we have a fever. We keep our rooms a certain warmth in the winter and a certain coolness in the summer.
Not all the thermometers use the same system to measure temperature. We use a system called the Fahrenheit scale. But most other countries use the Centigrade scale. Both systems use the freezing and boiling points of water as their guide. 2. .
The most common kind of thermometer is made with mercury inside a clear glass tube. As mercury (or any other liquid) becomes hot, it expands. As it gets colder, it contracts. That is why on hot days the mercury line is high in the glass tube. 3. .
First, take a clear glass juice bottle that has a cap; fill the bottle with colored water. Tap a hole in the center of the cap using a hammer and thick nail. Put the cap on the jar. Then stick a plastic straw through the nail hole.
4. .
Finally, place a white card on the outside of the bottle and behind the straw. Now you can see the water lever easily.
5. . As the temperature goes down, the water will contract, and the lever in the straw will come down. Perhaps you will want to keep a record of the water lever in the straw each morning for a week.
A. Now that you know this rule you can make a thermometer of your own that will work.
B. People use thermometers which are made by themselves when travelling around the world.
C. We use and depend on thermometers to measure the temperature of many other things in our daily lives.
D. The water will rise in the straw. As the temperature of the air goes up, the water will expand and rise even higher.
E. Thermometers measure temperature, by using materials that change in the same way when they are heated or cooled.
F. Take wax (you may use an old candle if you have one) and melt some of it right where the straw is struck into the cap to seal them together.
G. They label these in different ways. On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees. On the Celsius scale water freezes at 0 degree and boils at 100 degrees.
