2、直线与曲线交点的个数是

A、0 　　 　　B、1　 　C、2　 　　 　D、3

1、已知集合M={2(m²+5m+6)+(m²－2m－5)i，1}，N={(1+i)²+i²⁰⁰⁹}，且M∩N≠，则实数m的值为

A、－2或－3　 　 　B、－2或4　　 C、－2或5　 　　　 　D、－2

9.　　 the lamb is the clone of the donated cell from Sheep B which provided the nucleus.

On the one hand, the whole scientific world followed the progress of the first successful clone, Dolly the sheep. The fact that she seemed to develop normally was very encouraging. Then came the disturbing news that Dolly had become seriously ill. Cloning scientists were cast down to find that Dolly’s illnesses were more appropriate to a much older animal. Although Dolly lived six and a half years, half the length of the life of the original sheep. Sadly the same arbitrary fate affected other species, such as cloned mice. The questions that concerned all scientists were: “Would this be a major difficulty for all cloned animals? Would it happened forever? Could it be solved if corrections were made in their research procedure?”

　 On the other hand, Dolly’s appearance raised a storm of objections and had a great impact on the media and public imagination. It became controversial. It suddenly opened everybody’s eyes to the possibility of using cloning to cure serious illnesses and even to produce human beings.

　 Although at present human egg cells and embryos needed for cloning research are difficult to obtain, newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions. Religious leaders also raised moral questions. Governments became nervous and more conservative. Some began to reform their legal systems and forbade research into human cloning, but other countries like china and the UK, continued to accumulated evidence of the abundant medical aid that cloning could provide. However, scientists still wonder whether cloning will help or harm us and where it is leading us.

Unit 3 Inventors and inventions

THE PROBLEM OF THE SHAKES

When I called up my mother in the countryside on the telephone she was very upset.　

8.　　 the embryo is put into female sheep C, who becomes the carrier of the clone.

7.　　 the cell divides and grows into an embryo.

6.　　 the nucleus from sheep B and the egg cell from sheep A are joined using electricity.

5.　　 The nucleus is taken out of the somatic cell.

4.　　 Female sheep B provides a somatic cell for the clone.

The nucleus of this cell contains all the genes needed to produce a new sheep.

3.　　 The egg cell is ready fro a new nucleus.