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A private group of scientists has announced plans to make an exact copy of a human being. An American member of the team says he and  the others will soon begin a serious effort to clone humans. Panos Zavos says the team hopes to manufacture the world’s first cloned baby within the next two years. In recent years, scientists have produced exact genetic copies of sheep and a few other animals. They created these clones from a single cell of an adult animal. Three years ago, another American doctor, Richard Seed, announced plans to clone a human being. However, there is no evidence that he has been successful. Doctor Zavos says the new international group plans to offer human cloning only to women who are currently not able to become pregnant or produce children. He says the aim is to assist people who want to have their own biological child. The technology would be similar to that used to clone animals. It would involve cleaning genetic material from a woman’s egg. Doctors then would place genetic material from the woman’s husband into the egg before putting it into the woman’s uterus(子宫). Doctor Zavos says his group plans to do the work in a country near the Mediterranean Sea. He did not name the country. He says an Italian reproductive expert, Sevorino Antinori, is leading the team. Doctor Antinori has led the efforts to help many older women become pregnant. He is known for establishing pregnancies in women as old as sixty. Many medical experts and other groups are opposed to the idea of cloning humans. Several countries ban or restrict work on human cloning. Several doctors criticize the announcement by Doctor Zavos. They say doctors do not know if cloning humans is possible or safe. They say it would be irresponsible to attempt to clone a human being. That is because the chances of success are too small and the risks are too great. 小题1:The underlined word “manufacture” in the first paragraph  means “_________”. A.produce B.oppose C.attempt D.experiment 小题2:Which of the following statements is TRUE? A.In theory, scientists are unlikely to clone humans. B.Richard Seed has fallen behind other scientists in cloning humans. C.Cloning human beings is good for men. D.People have different ideas about cloning humans. 小题3:How do many medical experts and other groups like the idea of cloning humans? A.They are in favour of the idea. B.They are against the idea. C.They have an optimistic attitude to the idea. D.They think it is none of their business.
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参考答案:
举一反三
【单选题】中、日两国正式建立外交关系是在( )年。
A.
1968
B.
1971
C.
1972
D.
1974
【单选题】如图所示是做直线运动的甲、乙物体的位移—时间图象,由图象可判断下列说法中错误的是()
A.
当t=t 2 时两物体相距最远
B.
当t=t 2 时两物体相遇
C.
甲起动的时间比乙早t1秒
D.
当t=t 3 时两物体相距S0米
【单选题】t=0时,甲、乙两物体同时从同一地点出发沿同一直线运动,甲做匀速运动,乙做初速度为零的匀加速运动,以出发点为参考点,它们的位移—时间(x-t)图像如图所示,设甲、乙两物体在t 1 时刻的速度分别为v 甲 、v 乙 ,则关于能否确定v 甲 :v 乙 的值,下面正确的是()
A.
能确定,v 甲 :v 乙 =2:1
B.
能确定,v 甲 :v 乙 =1:2
C.
能确定,v 甲 :v 乙 =
D.
只能比较v 甲 与v 乙 的大小,无法确定v 甲 与v 乙 的比值
【单选题】如图所示是甲、乙两物体做直线运动的v-t图象。下列表述正确的是()
A.
乙做匀加速直线运动
B.
0~1s内甲和乙的位移相等
C.
甲和乙的加速度方向相同
D.
甲的加速度比乙的小
【单选题】如图所示是做直线运动的甲、乙物体的位移—时间(x-t)图象,由图象可知()
A.
乙起动的时间比甲早t 1 秒
B.
当t=t 2 时两物体速度相同
C.
当t=t 2 时两物体相距最远
D.
当t=t 3 时两物体相距x1米
【单选题】如图所示为甲、乙两物体做直线运动的v-t图象,下列表述正确的是()
A.
乙做匀加速直线运动
B.
0~1s内甲和乙的位移相等
C.
甲和乙的加速度方向相同
D.
甲的加速度比乙的小
【判断题】丰田生产方式被命名为精益生产,意味着达到用最少的投入实现最大产出的目的。
A.
正确
B.
错误
【单选题】国家标准《安全色》中规定,安全色为()四种颜色。
A.
红、蓝、黑、绿
B.
红、青、黄、绿
C.
红、蓝、黄、绿
【多选题】甲、乙两物体同时由同一地点沿同一方向做直线运动,它们的位移一时间图像如图所示,甲的图像为过坐标原点的倾斜直线,乙的图像为顶点在坐标原点的拋物线,则下列说法正确的是()
A.
甲、乙之间的距离先增大、后减小,然后再增大
B.
0~t 1 时间段内,乙的平均速度小于甲的平均速度
C.
t 1 时刻,乙的速度等于甲的速度
D.
t 1 时刻两物体相遇
【单选题】与资产负债表、利润表以及列报与披露都相关的认定是()。
A.
存在
B.
发生
C.
完整性
D.
计价
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