题干

鸟的特征中,不属于适应飞行特征的是(  )

A:前肢变成翼

B:食量大,消化强

C:气囊辅助呼吸

D:卵外有卵壳保护

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D

同类题3

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                                                                                Get a Thorough Understanding of Oneself.

    In all one's life lime it is oneself, that one spends the most time being with or dealing with.____.

    When you are going upwards in life you tend to overestimate yourself. It seems that everything you seek for is within your reach,____ It's likely that you think it wise for yourself to stay away from the outer world. Actually, to get a thorough understanding of oneself, you may as well keep the following tips in mind.

Gain a correct view of oneself.

    You may look forward hopefully to the future but be sure not to expect too much, for dreams can never be fully realized. You may be courageous to meet challenges but it should be clear to you where to direct your efforts.____

Self-appreciate.

    Whether you compare yourself to a towering tree or a blade of grass, a high mountain or a small stone, you represent a state of nature.____ If you earnestly admire yourself you'll have a real sense of self-appreciation.

____ In time of anger, do yourself a favor by releasing it in a quiet place so that you won't be hurt by its flames; in time of sadness, do yourself a favor by sharing it with your friends so as to change a bad mood into a cheerful one; in time of tiredness, do yourself a favor by getting a good sleep.

Get a full control of one's life.

    Then one will find one's life full of color and favor.

A. It has its own value.

B. Do oneself a favor when it's needed.

C. Do yourself a favor when you resist the attack of illness.

D. But it is precisely oneself that one has the least understanding of.

E. Especially if it is well within your reach, you are just too blind to see it.

F. When you are going downhill you tend to underestimate yourself for your own incompetence,

G. o long as you have a perfect knowledge of yourself, there won't be difficulties you can't overcome.

同类题5

                                                                                      The Price of a Dream

    I grew up poor. We had little money, butplenty of love and attention. I understood that no matter how poor a person was, they could still afford a dream. My dream was athletics.

    By the time I was sixteen, I was good at baseball and football. My high-school coach was Ollie Jarvis. He not only believed in me, but taught me the difference between having a dream and showing conviction(信念).

    One summer a friend recommended me for asummer job. This meant a chance for money in my pocket — cash for dates withgirls, certainly, money for a new bike and new clothes, and the start of savings for a house for my mother.

    Then I realized I would have to give up summer baseball to handle the work schedule, and that meant I would have to tell Coach Jarvis I wouldn't be playing. I was dreading(害怕)this, but my mother said: “If you make your bed, you have to lie in it.

    When I told Coach Jarvis, he was as madas I expected him to be. “Your playing days are limited. You can't afford to waste them,” he said.

   I stood before him with my head hanging, trying to think of the words that would explain to him why my dream of buying my mom a house.

  “How much are you going to make at this job, son?” he demanded.

  “Three twenty-five an hour,” I replied.

  “Well,” he asked, “is $3.25 an hour the price of a dream?”

    That question laidbare for me the difference between wanting something right now and having agoal. I devoted myself to sports that summer, and within the year I was drafted by the Pittsburgh Pirates to play rookie-league ball, and offered a $20,000 contract. I signed with the Denver Broncos in 1984 for $1.7 million, and boughtmy mother the house of my dream.