有关铁的代谢，下列描述哪一项是错误的（） A.食物铁以二价铁形式在胃内吸收 B.母乳

There is _____ sheep eating grass there.      [ ]

A. a little

B. little

C. a few

D. few

填补下列名句的空缺处或按要求填空。（8分，每空1分）

（1）见贤思齐焉，______________________。

（2）______________________，勿施于人。

（3）三人行，______________________。择其善者而从之，其不善者而改之。

（4）______________________，志在千里。

（5）孟浩然《过故人庄》“______________________，_______________________”写出了层次分明的近景和远景——围绕着村落的绿树与斜倚在绿树之外的青山，相映成趣。

（6）我们永远不能忘了“______________________，_______________________”，提醒自己，始终保持清醒的头脑，做到学思结合。（用《〈论语〉十则》中的句子回答）

Science, as we think, was born when the Greek philosopher ( 哲学家 ) Thales ( about 640-546 B.C.) asked a difficult question: What makes up our universe?

No one had a ready answer, so Thales went on studying the earth around him, the sky and the stars. He saw so much water on earth and so much water falling from the sky as rain that he decided water must be the basic substance ( 物质 ) of the universe.

Other Greek thinkers became interested in this question. They suggested other answers. One said that because air lies around the earth, it must be air that makes up all things. Another said that fire, appearing in different forms, was the building block of the universe.

The Greek philosophers were feeling their way towards the ideas on which chemistry is based. Centuries later, scientists proved that the universe is made up of certain basic substances. But the list is much more complicated than the Greeks realized. We now know of 103 basic substances which we call “ elements ( 元素 )”.

小题1:Thales, the famous Greek philosopher, died when he was about _______________.

A．94 years old

B．106years old

C．40 years old

D．46 years old小题2:The meaning of the underlined word “complicated” in the last paragraph is “ ____________”.

A．not difficult

B．not simple

C．not famous

D．not different小题3:After reading the passage, we can be sure that________________.

A．nothing ever changes in the universe

B．Thales decided that the basic substance of the universe was air

C．the universe is made up of four different substances

D．the early Greek thinkers did much valuable work for the progress of science

对于阻塞性肺气肿，哪一项描述正确（）.

A.经积极治疗可以痊愈

B.其病理改变是不可逆的

C.仅限于肺泡弹性减退与膨胀

D.α₁-抗胰蛋白酶增加易发生肺气肿

E.肺功能改变主要是肺活量减少

酒的生产是建立在（）的基础上的，酿酒原料中的糖在酶的作用下，最终转为乙醇。

A.物理学

B.生物技术

C.化学

D.生物学