题目内容：

第一栏是五个人的状况描述，第二栏是相关信息。请从第二栏中选出与第一栏相匹配的信息。

66.Xiao Ming is interested in astronomy (天文学)．Is it hot or cold on the stars？What are the stars made of？

67.Kate has long and beautiful hair.She says she always uses a certain shampoo (洗发水)．Why do the shampoos make hairs clean and smooth？

68.Why can all the plants be grown well in the soil？Which materials contain (包含) in the soil？John wants to know the answer.

69.I wonder the origin of the universe，and its form，its constitute...Can you tell me？

70.Candles give us light in the dark.But do you know what in the candles can burn to light？

A.Until about thirty years ago，astronomers thought that it was composed almost entirely of this “baryonic matter (重子物质)”，ordinary atoms (原子)．However，in the past few decades，there has been even more evidence accumulating that suggests there is something in it that we can not see，perhaps some new form of matter.

B.They are composed primarily of chemicals called surfactants (表面活性剂) that have the special ability to surround oily materials on surfaces and allow them to be rinsed away while washing the hair by water.

C.They are made out of wax (蜡) and contain fragrances，minor additives，colorants and come in a variety of shapes and size.

D.It is a combination of both living and non­living materials.One part of it is broken­down rock.Another is organic matter made up of decaying (腐烂的) plants and animals.Water and air are also a part of it.

E.Some of them，such as polystyrene，are composed of monomers that contain only carbon and hydrogen (氢)．All organic plastics include a long backbone of carbon.

F.Basically，they are big exploding (爆炸的) balls of gas，mostly hydrogen and helium (氦)．The nearest one to us，the sun，is so hot that the huge amount of hydrogen is undergoing a constant star­wide unclear reaction，like in a hydrogen bomb.

G.It depends upon the kind.Most of them are made from collagen/gelatin (胶原蛋白)，which comes from the skin，bones and hooves of horses，pigs and cows.

 

 

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