问题 解答题

如图是心脏结构示意图,回答:

(1)填写指定部分名称③______   ⑧______

(2)在图中,动脉瓣使血液从心室流向______;右心房使血液从心房流向______,从而保证血液按一定方向流动而不能______.

答案

(1)据图可知:①上腔静脉,③房室瓣,④右心房,⑤右心室,⑥下腔静脉,⑦左心室,⑧左心房,⑨肺动脉,⑩主动脉

(2)心房与心室之间、心室与动脉之间,都有能开闭的瓣膜:这些瓣膜只能向一个方向开:房室瓣只能朝向心室开,动脉瓣只能朝向动脉开.这样就保证了血液只能按一定的方向流动:血液只能从心房流向心室,从心室流向动脉,而不能倒流.图示中编号③表示心房与心室之间的房室瓣.

故答案为:

(1)房室瓣;   左心房     (2)动脉;  心室;倒流.

阅读理解

Mother’s Day is a holiday for mothers. It is celebrated(庆祝)in the United States, England, India and some other countries. In a short time, it becomes widely celebrated. Mother’s day falls on the second Sunday in May. On that day, many people send gifts(礼物)of love to their mothers.

Those whose mothers are still living often wear a pink or red rose or carnation(康乃馨), while those whose mothers are dead wear a white one.

The idea of a day for mothers was first given by Miss Anna Jarvis of Philadelphia. As a result of her hard work, the celebration of the first American Mother’s Day was held in Philadelphia(费城) on May 10, 1908. Soon the holiday became popular all over the country and around the world.

In China, people do the same on the day for mothers. And, in some cities, people sometimes ask a song to be broadcast(广播) for his or her mother only. This might cost a little money for some of them, but, as it is said, “Love is invaluable.”

On May 8, 1999, just the day before the Mother’s Day that year, a Chinese mother was killed in criminal bombing(罪恶轰炸). Her name is Shao Yanhuan, a heroic mother. All the Chinese will remember her forever.

小题1: Mother’s Day         .

A.is a holiday for mothers

B.is celebrated in the United Stated only

C.falls on May 10 every year

D.was given by Miss Anna Jarvis小题2:What was the date of the Mother’s Day in 1999?

A.May 7.

B.May 8.

C.May 9.

D.May 10小题3:On Mother’s Day, people       .

A.send some flowers to their mothers.

B.wear a pink or red rose or carnation

C.wear a white flower

D.send gifts of love to their mothers小题4: the underlined word “invaluable” means “   ”.

A.美好的

B.无价的

C.永恒的

D.无私的小题5:Maybe you’ve known the criminal bombing, which of the following ideas do you agree to?

A.Shao Yunhuan is a heroic mother.

B.A Chinese mother is the same as an American mother.

C.The bombing cannot get away with the crime (难逃罪责).

D.All of the above

单项选择题