问题 选择题

下面不是我国特有的珍稀动植物的是(  )

A.人参

B.银杉

C.珙桐

D.大熊猫

答案

界:A、人参被誉为“百草之王”,自古以来便是驰名中外、老幼皆知的名贵药材.世界上栽培人参的国家有十余个如高丽参、西洋参,我国人参产量虽雄踞世界首位,但长期以来,我国的人参产业却存在一系列制约发展的问题.故该选项符合题意;

B、银杉,是三百万年前第四纪冰川后残留下来至今的植物,中国特有的世界珍稀物种,和水杉、银杏一起被誉为植物界的“国宝”,国家一级保护植物.银杉是松科的常绿乔木,主干高大通直,挺拔秀丽,枝叶茂密.银杉雌雄同株.故该选项不符合题意;

C、珙桐又叫“中国鸽子树”,国家一级重点保护植物,是我国特产的单型属植物.世界上著名的观赏树种.珙桐树盛开繁花,它的头状花序下有两枚大小不等的白色苞片,呈长圆形或卵圆形,长六至十五厘米,宽三至八厘米,如白绫裁成,美丽奇特,好像白鸽舒展双翅;而它的头状花序象白鸽的头,因此珙桐有“中国鸽子树”的美称属落叶乔木.花奇色美,是1000万年前新生代第三纪留下的孑遗植物,在第四纪冰川时期,大部分地区的珙桐相继灭绝,只有在我国南方的一些地区幸存下来,成为了植物界今天的“活化石”.故该选项不符合题意;

D、大熊猫,一般称作“熊猫”,是世界上最珍贵的动物之一,数量十分稀少,属于国家一级保护动物,体色为黑白相间,被誉为“中国国宝”.大熊猫是中国特有种,属熊科,现存的主要栖息地在中国四川、陕西等周边山区.全世界野生大熊猫现存大约1590只左右.更重要的是,它是有着300万年历史的古老动物,对科学工作者研究古代哺乳动物具有珍贵的价值.化石研究表明,大熊猫几百万年来的形态构造变化不大.现今的大熊猫仍然保留着许多原始的特征.因此,大熊猫有着“活化石”之称.故该选项不符合题意.

故选A.

单项选择题 共用题干题
阅读理解

阅读理解

     Sweetest Day is celebrated on the third Saturday in October as a day to make someone happy. It is

an occasion(时候)which offers all of us an opportunity to remember not only the sick, the aged, and

children who have lost their parents, but also friends, workmates, relatives and neighbors whose

helpfulness and kindness we have enjoyed.

     Over 60 years ago, when a Cleveland man noticed that some people, such as children who lost their

parents and patients who lay in bed, too often felt forgotten and neglected, he developed in his mind the

idea of showing them that they were remembered. He did this by giving them small gifts. With the help of

his friends and neighbors, he gave those people small gifts on a Saturday in October. During the years that followed, other Clevelanders began to take part in the celebration, which came to be called "Sweetest

Day". Over time, the Sweetest Day idea of spreading cheer to the poor, the sick and children who had lost their parents was broadened to include everyone, and became an occasion for remembering others with a kind act or a small gift. Soon the idea spread to other cities all over the USA.

     Sweetest Day is not based on any single group's religious beliefs or on a family relationship. It is a

reminder that a thoughtful word or deed enriches life and gives it meaning.

     Because for many people remembering takes the form of gift giving, Sweetest Day offers us the

opportunity to show others that we care, in a positive way.

1. What can we learn from the passage?

A. Sweetest Day is a day to make others happy.

B. Sweetest Day is just an occasion to care about disabled people.

C. Sweetest Day is an occasion for lovers to express love.

D. Sweetest Day is celebrated on the third Sunday in October.

2. What is Cleveland?

A. An island. B. A country.    

C. A village in England.    

D. A city in America.

3. What do most people usually do to show their care to others according to the passage?

A. They give money.

B. They give gifts.

C. They send regards.    

D. They offer help.