With the advances of technology, plastics have taken the place of many _____materi?als.
A. optional B. conventional C. artificial D. potential
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科目:高中英語 來源:設(shè)計(jì)必修三 英語 人教版 人教版 題型:050
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科目:高中英語 來源:山東省濰坊市2012屆高三下學(xué)期考前仿真模擬(五)英語試題 題型:050
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科目:高中英語 來源:2006年南京市高三第二次模擬考試英語 題型:054
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科目:高中英語 來源: 題型:閱讀理解
閱讀下面短文,掌握其大意,然后從各題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng)。
One of Mark Twain’s classic novels is The Adventures of Tom Sawyer. It is 36 in a small American town in the 19 th century. The people in this town are very traditional and 37 a quiet life.The story is about a boy called Tom Sawyer, who lives with his aunt Polly. He is often in 38 with his aunt. Aunt Polly is very kind, 39 Tom thinks she is always trying to control him.
Tom is different from 40 children in the town. He loves adventure. He does a lot of bad things, but he never really 41 anyone. He tries very hard not to go to school, and often jumps 42 his bedroom window at night to meet his friends. He is very clever. One day, Aunt Polly asks him to do some painting, and he 43 to get all the boys in the town to do the work for him by inventing a new 44 game. It is these little stories 45 make readers want to keep reading the novel, but it is the adventures that 46 the most important part of the book.
Tom’s best friend is Huck Finn, a boy who has no home. In one adventure, they spend the night outside, and they see a man kill another man 47 . Later in the book, Tom, Huck and another boy decide to leave the town 48 they think that life there is too boring. They __49__ to an island in the middle of a river. They 50 fires, catch fish and sleep under the stars. They also make a 51 to travel up and down the river. 52 seeing the boys for days, the people in the town think that they have died. One day, when Tom cones back to his aunt’s house to leave a letter 53 that he is not dead, he hears his aunt talking about his funeral(葬禮). 54 Tom has an idea. On the morning of their funeral, the boys run back into town and 55 their own funeral before telling everyone that they are still alive.
36. A. made B. set C. taken D. written
37. A. have B. pass C. live D. own
38. A. trouble B. silence C. peace D. war
39. A. and B. but C. still D. as
40. A. another B. others C. the others D. the other
41. A. damages B. destroys C. ruins D. hurts
42. A. out of B. into C. onto D. in front of
43. A. tries B. fails C. manages D. struggles
44. A. fighting B. painting C. touring D. sailing
45. A. which B. that C. what D. where
46. A. is B. was C. are D. were
47. A. in charge B. in advance C. in the long term D. in the dark
48. A. because B. while C. even though D. if
49. A. run into B. run away C. run across D. run out of
50. A. catch B. set C. make D. put
51. A. bike B. boat C. camel D. cage
52. A. By B. Upon C. At D. Without
53. A. writing B. telling C. saying D. meaning
54. A. Then B. Besides C. Also D. Lastly
55. A. join B. present C. participate D. attend
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科目:高中英語 來源: 題型:閱讀理解
Can people change their skin color without suffering like pop king Michael Jackson? Perhaps yes.Scientists have found the gene that determines skin color.
The gene comes in two versions, one of which is found in 99 per cent of Europeans.The other is found in 93 t0 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.
Scientists have changed the color of a dark - striped zebrafish(斑馬魚) to uniform gold by inserting a version of the pigment(色素) gene into a young fish.As with humans, zebrafish skin color is deter-mined by pigment cells,which contain melanin(黑色素).The number, size and darkness of melanin perpigment cell determine skin color.
It appears that, like the golden zebrafish, light - skinned Europeans also have a mutation (變異) in the gene for melanin production.This results in less pigrnented skin.
However, Keith Cheng, leader of the research team, points out that the mutation is different in hu-man ancl zebrafish genes.
Humans acquired dark skin in Africa about l.5 million years ago to protect bodies from ultra - violetrays of the sun. which can cause skin cancer.
But when modem humans leave Africa to live in northem latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.
Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin color, said Cheng.
The new discovery could lead to medical treatments for skin cancer.lt also could lead to research in-to ways to change skin color without damaging it like chemical treatment did on Michael Jackson.
56.Scientists have done an experiment on a dark -striped zebrafish in order to
A.fincl the different genes o humans'
B.prove the humans' skin color is determined by the pigment gene
C.find out the reason why the Africans' skin color is dark
D.fincl out the ways of changing people's skin color
57.lt can be inferred from the passage that .
A.nowadays people who want to change their skin color have to suffer 8 lot from the damage caused by the chemical treatment
B.Europeans and Africans have the same gene
C.the new discovery could help to find medical treatments for skin cancer
D.there are two kinds of genes
58.The passage mainly tells us that .
A.scientists have found out that people's skin color is determined by the gene
B.the new discovery could lead to research into ways to change skin color safely
C. pop king Michael Jackson often changed his skin color as he liked
D.people can not change their skin color without any pain
59.The reason why Europeans are light - skinned is probably that .
A.they are bom light - skinned people
B.light - skinned Europeans have mutation in the gene for melanin production
C. th ey have fewer activities outside
D.they pay much attention to protecting their skin
60.The writer's attitude towarcls the discovery is .
A.neutral B.negative C.indifferent D.positive
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