“三面云山一面城”是对杭州西湖特点的形象概括。

Once there lived a rich man      小题1:    wanted to do something for the people of his town. But first he wanted to find out whether they deserved his help.

In the centre of the main road into the town, he placed     小题2:    very large stone. Then he     小题3:   (hide) behind a tree and waited. Soon an old man came along with his cow.

“Who put this stone in the centre of the road?” said the old man, but he did not try to remove the stone. Instead, with some difficulty he passed around the stone and continued on his way.     小题4:    man came along and did the same thing; then another came, and another. All of them complained about the stone but not tried to remove     小题5:  . Late in the afternoon a young man came along. He saw the stone,     小题6:   (say) to himself, “The night     小题7:  (be) very dark. Some neighbors will come along later in the dark and will fall against the stone.”                 

Then he began to move the stone. He pushed and pulled with all his      小题8:   (strong) to move it. How     小题9:    (greatly) his surprise was at last!    小题10:  the stone, he found a bag of money.

在声音感受的过程中，最重要的振动膜是

A．鼓膜

B．前庭膜

C．蜗窗膜

D．基底膜

E．盖膜

高炉发生凉炉，对铸铁所造成的影响是（）。

A.铁水流动性差，粘罐严重

B.铁水温度低，运罐时间要缩短

C.铁水太稀，铁水罐侵蚀严重

精液稀释中卵黄主要起（）作用。