Why does the author compare the trade unions with managers incompaniesA.They are both infl

Why does the author mention genetic engineering and computer science？

A．To compare them with the new materials.

B．To show the significance of the new materials on the future world.

C．To compare the new materials with them.

D．To explain his point.

Why does the author mention genetic engineering and computer science？

A．To compare them with the new materials.

B．To show the significance of the new materials on the future world.

C．To compare the new materials with them.

D．To explain his point.

Why does the author compare smoking with obesity in this text？

A．They are both problems difficult to settle.

B．They can lead to the same diseases.

C．They are both bad habits.

D．They are both harmful to health.

Why does the author mention the Stanford scientists in the second paragraph？

A．To compare hard work done by Roslin Institute to that of the two Stanford scientists.

B．To prove that scientific research can make money be the patent.

C．To suggest that why Geron-Roslin is keen to get its patent.

D．To underline that Geron company is money-oriented.

Why does the author compare rain forests with coral reefs？

A.They ale approximately the same size．

B.They shale many similar species．

C.Most of their inhabitants require water．

D.Both have many different forms of life．

Why does the author compare Mars to Earth in paragraph 6？

A．To emphasize that there is more water on Earth than on Mars

B．To point out that Mars has the conditions for life to exist

C．To state that there are no differences between Mars and Earth

D．To explain why life emerged on Earth but not on Mars

Why does the author compare rain forests with coral reefs？

A．Because they are approximately the same size.

B．Because they share many similar species.

C．Because most of their inhabitants require water.

D．Because both have many different forms of life.

Why does the author compare archeology to doing a jigsaw puzzle？

A．To indicate what archeology contributes to us.

B．To show how difficult doing archeology is.

C．To explain the challenge and charm of archeology.

D．To display how people do archeology research.

Why does the author compare archeology to doing a jigsaw puzzle？

A．To indicate what archeology contributes to us.

B．To show how difficult doing archeology is.

C．To explain the challenge and charm of archeology.

D．To display how people do archeology research.

Why does the author mention the Weddell Sea？

A．To show that this body of water has salinity variations.

B．To compare Antarctic waters with Arctic waters.

C．To give an example of cold-water salinity.

D．To point out the location of deep waters.