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[单项选择]Cloning(克隆)：Future Perfect
1 A clone is an exact copy of a plant or animal produced from any one cell Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997 research into cloning has grown rapidly．In May 1998，scientists in Massachusetts managed to create WTO identical calves(牛犊)using cloning technology A mouse has also been cloned successfully But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement：“We will have managed to clone a human being within the next two
years，”he told the world．
2 Seed’s announcement provoked a lot of media attention，most of it negative．In Europe，nineteen nations have already signed an agreement banning human cloning and in the US the President announced：“We will be introducing a law to ban au human cloning and many states in the US will have passed anti—cloning laws by the end of the year”
3 Many researchers are not so negative about cloning They are wor
[单项选择]Cloning(克隆)：Future Perfect
1 A clone is all exact copy of a plant or animal produced from any one cell. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997，research into cloning has grown rapidly．In May 1998，scientists in Massachusetts managed to create two identical calves(牛犊)using cloning technology．A mouse has also been cloned successfully， But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement：“We will have managed to clone a human being within the next two years，”he told the world．
2 Seed’S announcement provoked a lot of media attention，most of it negative．In Europe， nineteen nations have already signed an agreement banning human cloning and in the US the President announced：”We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year．’’
3 Many researchers are not so negative about cloning，They
[单项选择]生命科学中“克隆”(CLONE)一词的含义是( )。
A. 生物个体的再生
B. 生物个体的无性繁殖
C. 繁殖出的生物个体没有性别
D. 生物个体的细胞移植
[单项选择]克隆病
A. 病变多累及回肠末端及邻近结肠
B. 病变多累及升结肠
C. 病变多累及横结肠
D. 病变多累及乙状结肠、直肠
[简答题]Wiping away doubts that Dolly the sheep clone was a fluke, University of Hawaii researchers announced they’ve been cloning mice for months, creating a flock of more than 50 duplicate rodents along the way. 71. The success of the Hawaii group transforms adult cloning from a scientific novelty to a well-defined procedure likely to be .reproduced in labs around the world. The mass production of carbon copy mice, in turn, now allows researchers to test variations of the cloning techniques to see what works best. Cloning the genetically engineered mice used in medical studies should also be cheaper than current breeding methods.
The Hawaii researchers use essentially the same recipe used to make Dolly: Take an egg. Scoop out the nucleus, which contains the DNA genetic information, and discard. Take a cell of the animal you wish to clone and insert its DNA into the egg. Add chemicals to tell the egg to start developing into an embryo. Incubate the embryo in a test tube for a few
[单项选择]What is the exact meaning of ageism
A. A negative period of impotency and incompetency.
B. A negative and/or stereotypical perception of older adults.
C. A definition of stereotypical and often negative attitudes.
D. A denotation against the negative bias of older adults.
