题干

据悉,***主席对国产大飞机C919总装下线作重要指示:继续弘扬航空报国精神,进一步提升我国装备制造能力。航空报国精神的核心是(   )

A:改革创新

B:爱国主义

C:为人民服务

D:依宪治国

上一题 下一题 0.0难度 选择题 更新时间:2018-05-20 06:06:22

答案(点此获取答案解析)

B

同类题3

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    A disease called “Panama” is threatening supplies of the world's most popular fruit—banana.Two years ago,the United Nations warned that the "Panama disease" could destroy "much of the world's banana crop."Since then,things have not gotten better.A new outbreak was discovered last year in Australia.The disease started in Asia in the 1990s, and later spread to Africa and the Middle East.

    World health officials worry the disease could travel to Latin America,one of the top banana producers in the world.All this is a big concern because bananas are an important source of income and nutrients for millions of people.They are grown in 135 tropical nations.The United Nations lists bananas as one of the most important foods, along with rice,wheat and corn.

    Randy Ploetz is a professor at the Tropical Research & Educational Center at the University of Florida.Many consider him as America's top banana expert.As he explained,Panama disease affects the Cavendish banana.The Cavendish is one of more than 500 kinds of bananas.But it is the most popular.

    “The industry is waking up to the problem,”Ploetz said.“They are pretty scared.”He was speaking Thursday by telephone from Miami,Florida,where he is among 1,000 people attending the International Banana Congress.The meeting was supposed to take place in Costa Rica,but was moved at the last minute.There were concerns banana growers could spread Panama disease from dirt collected on their shoes,Ploetz said.

    Ploetz said reports that Cavendish banana production could end are not correct.But if the disease spreads to Latin America,it could hurt the world's economy along with food supplies for millions of people.Still,he said there is reason for hope.Scientists in Australia are working on a genetically engineered banana that might not be at risk of getting Panama disease.

同类题4

    A lady in an old cotton dress and her husband, dressed in an old suit, stepped off the train in Boston, and walked into the president of Harvard's outer office. The secretary could tell in a moment that such country people had no business at Harvard. She frowned(皱眉). “We want to see the president,” the man said softly. “He'll be busy all day,” the secretary said coldly. “We'll wait,” the lady replied.
    For hours, the secretary didn't talk to them, hoping that the couple would finally become tired and go away. They didn't. And the secretary finally decided to disturb the president. “Maybe if they just see you for a few minutes, they'll leave,” she told him. He frowned too. Someone of his importance obviously didn't have the time to spend with them.
    The president walked toward them unwillingly. The lady told him, “We had a son that attended Harvard for one year. He loved Harvard, and was very happy here. But he was accidentally killed. And my husband and I would like to set up a memorial(纪念碑) to him somewhere on campus. ”The president was so surprised that he shouted sharply, “We can't put up a statue(塑像) for every person who attended Harvard and died. This place would look like a cemetery (墓地).
   “Oh, no” the lady explained, “We don't want to build a statue. We thought we would give a building to Harvard.” The president rolled his eyes. He glanced at their plain clothes, and said with surprise, “A building! Do you have any idea how much a building costs? We have over seven and a half million dollars in the physical buildings here at Harvard.”
    For a moment the lady was silent. The president was pleased. He could get rid of them now. The lady turned to her husband and said quietly. “Is that all it costs to start a university? Why don't we just start our own?” Her husband nodded. Mr. and Mrs. Leland Stanford walked away, traveling to Palo Alto, California where they set up the university with their name, Stanford University, a memorial to a son that Harvard no longer cared about.