题目内容
A ______ part of a baby's life is spent sleeping.
A. main B. major C. minor D. junior
B
句意:婴儿的大部分时间都花在睡眠上。main 主要的,强调内容的重要性;minor 少数的;junior 年幼的。
One of my father’s favorite sayings as I was growing up was “Try it!” I couldn’t say I didn’t like 21, whatever it might be, 22 I tried it. Over the years I’ve come to 23 how much of my success I owe to my 24 of those words as one of my values. My 25 job was just one I decided to try for a couple of years until I 26 what I wanted to do as a career (职业) . 27 I believed I would work for a few years, get married, stay home and raise a family, so I didn’t think the job I took 28 that much . I couldn’t have been more 29. I mastered the skills of that beginning level position and I was given the opportunity (机会) to 30 through the company into different 31. I adopted each new opportunity with the 32, “Well, I’ll try it; if I don’t like it I can always go back to my 33 position.” But I was with the same company for the past 28 years , and I’ve 34 every career change I’ve made. I’ve discovered I 35 a large number of different talents (才能) and skills that I never would have thought were within me had it not been for my being 36 trying new opportunities. I’ve also discovered that if I 37 what I’m doing and word hard at achieving my 38. I will succeed. That’s why I am so 39 to be a part of CareerFables.com. I think 40 has come and I am determined to make it a success.学科网
21. A. everything | B. something | C.everybody | D.somebody学科网 |
22. A. until after | B.ever since | C.so that | D.long before学科网 |
23. A. consider | B.argue | C.include | D.realize学科网 |
24. A. suggestion | B.explanation | C.acceptance | D.discussion学科网 |
25. A. hard | B.best | C.extra | D.first学科网 |
26. A. determined | B.examined | C.experienced | D.introduced学科网 |
27 A. Actually | B.Gradually | C.Finally | D.Usually学科网 |
28. A. helped | B.required | C.expressed | D.mattered学科网 |
29. A. careful | B.mistaken | C.interested | D.prepared学科网 |
30. A. look up | B.take up | C.move up | D.put up学科网 |
31. A. situations | B.choices | C. directions | D.positions学科网 |
32. A. thought | B. reply | C.action | D. advice学科网 |
33. A. easier | B. newer | C. earlier | D. higher学科网 |
34. A. permitted | B.counted | C.organized | D.enjoyed学科网 |
35. A. show | B.possess | C.need | D.gather学科网 |
36. A. lucky for | B.slow at | C.open to | D.afraid of学科网 |
37. A. think of | B.give away | C.believe in | D.turn into学科网 |
38. A. business | B.goal | C.fortune | D.growth学科网 |
39. A. excited | B.curious | C.surprised | D.helpful学科网 |
40. A. dream | B.time | C.power | D.honor学科网 |
We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.
MONTAGNE: How many things emit radiation?
Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air.
So the extremes are uranium in the soil to bananas?
Yes.
By the way, why do bananas have radiation?
Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive
What’s the difference between radiation that’s harmful and not harmful?
Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer.
The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave.
So what then is the largest contributor of ionizing radiation?
For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements.
Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation?
I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life.
1.We can infer from the first paragraph that radiation is______.
A.rare |
B.powerful |
C.dangerous |
D.common |
2.The passage may be _______.
A.an interview |
B.an argument |
C.a talk show program |
D.a science report |
3.Whether radiation is harmful or not depends on______.
A.whether it has a small amount of potassium |
B.whether it changes chemical in materials. |
C.whether it has energy to change materials |
D.whether it is visible in life |
4.The purpose of writing this passage is to _______.
A.advise on how to protect us from radiation |
B.analyze what causes radiation in daily life |
C.warn people of the danger of radiation |
D.expect people not to fear everyday radiation |