题目内容
Which came first, the chicken or the egg? This is one of life’s 1 questions and people have been debating about it for thousands of years. Now scientists believe they have solved this 2. Researchers from Sheffield and Warwick Universities in England discovered the answer 3. They used a super computer to observe the shell-making process while a new shell was 4. Then they found one protein called OCl7 that is 5 for forming eggshell. This is only found inside a chicken’s body, which is proof that the 6 came first. The team was 7 looking at how animals and birds make eggshells but suddenly made their surprising 8. The big question now is where chickens came from. The 9 is from dinosaurs.
The research team said eggshells are one of nature’s most 10 creations. Professor John Harding from the team told reporters: “Understanding how chickens make eggshells is fascinating in itself, but it can also be 11 in designing new materials.” Eggshells are very lightweight but incredibly strong. Even the most up-to-date materials 12 by the world’s top engineers can not produce anything as 13 as an eggshell. Professor Harding added that 14 eggshells could help to cure bone diseases and design materials for the construction industry.“Nature has found wonderful ways that 15 for all kinds of problems in materials science and technology — we can learn a lot from them.” he said.
- 1.
- A.strangest
- B.best
- C.oldest
- D.longest
- A.
- 2.
- A.puzzle
- B.story
- C.history
- D.idea
- A.
- 3.
- A.on purpose
- B.by chance
- C.without hesitation
- D.at work
- A.
- 4.
- A.breaking
- B.changing
- C.disappearing
- D.forming
- A.
- 5.
- A.necessary
- B.easy
- C.kind
- D.impossible
- A.
- 6.
- A.egg
- B.eggshell
- C.chicken
- D.dinosaur
- A.
- 7.
- A.obviously
- B.originally
- C.thoughtfully
- D.surprisingly
- A.
- 8.
- A.invention
- B.mistake
- C.statement
- D.discovery
- A.
- 9.
- A.answer
- B.research
- C.key
- D.egg
- A.
- 10.
- A.strange
- B.ridiculous
- C.funny
- D.amazing
- A.
- 11.
- A.hopeful
- B.helpful
- C.respectful
- D.colorful
- A.
- 12.
- A.bought
- B.cut
- C.designed
- D.carried
- A.
- 13.
- A.brilliant
- B.ordinary
- C.light
- D.strong
- A.
- 14.
- A.finding
- B.watching
- C.studying
- D.making
- A.
- 15.
- A.happen
- B.work
- C.wait
- D.look
- A.
1.C oldest“古老的”。
2.A puzzle“难题,谜团”。
3.B by chance“偶然”。符合题意。
4.D shell-making process“蛋壳形成的过程”,故选D。
5.A necessary,是蛋壳形成必须的。
6.C chicken“(小)鸡”,蛋白质OCl7只存在鸡的体内,故先有鸡。
7.B originally“最初,起初”,起初在观察蛋壳如何形成时,
8.D discovery“发现”。“突然发现了这个现象”。
9.A“答案是鸡来自恐龙”。answer与question对应。
10.D根据文意知,选D,蛋壳是自然界最令人惊异的发明之一。
11.B helpful“有帮助的”。蛋壳能帮助组织新物质。
12.C designed“被......设计”。
13.A brilliant“灿烂的,光辉的”。形容蛋壳的优点。
14.C研究团队是在“研究”蛋壳。
15.B work for…“为......效力”。自然界蕴含解决各种问题的奇妙的的方法。
After spending a weekend away with my adult son, I was so impressed by his generous heart that I sent him this letter.
Dear son,
I want to thank you for teaching me a very valuable lesson in life by the great example you 31 . When we were eating at that cafe in Boston and a person who had 32 his hamburger didn’t have enough money to pay for it, without 33 , you went over and 34 the extra $2 into his hand.
When we were leaving, you 35 threw a five-cent coin onto the pavement and said something like, “Some kid will really enjoy 36 this.”
Last week, a young man 37 me in the line at a petrol station didn’t have 38 money to pay for his petrol. I asked the money collector, “How much 39 is he?” She told me he had meant to put $15 of petrol in his car 40 he had been looking at the wrong gauge (计量表) and had put in 15 41 , which came to a little over $20. That is an easy mistake as both gauges run fast.
Something made me think of you and 42 you did that night at the cafe in Boston. I handed the man $6. He was so 43 and said, “But why would you do this for me?” I just smiled as I thought of you.
Thank you, son, for teaching me that “it’s 44 to give than to receive”. Now when I see a five-cent coin on the 45 and want to pick it up, I think of you and leave it there, just in case some kid will get a kick out of finding it.
Love always, Mum.
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