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【简答题】
Once there was a baby eagle living in a nest (巢) on a cliff (山崖). The baby eagle loved his nest. It was warm, soft and comfortable. And even better, he had all the food and love that his mother could give. Whenever the baby eagle was hungry, his mother would always come just in time with the delicious food he liked. He was growing happily day after day. But suddenly his world changed. His mother stopped coming to the nest, he was full of sadness and fear. He thought he would die soon. He cried, but nobody heard him. Two days later mother appeared with some nice food. The baby eagle was wild with joy. But his mother put the food at the top of the mountain and then looked down at her baby. The baby eagle cried out, “Mum, why did you do this to me? I’m hungry. Don’t you know I will die if 1 have nothing to eat?” “Here is the last meal I give you. Come and get it by yourself.” his mother said. Then she flew down and pushed the baby eagle out of the nest. The baby eagle fell down, faster and faster. He looked up at his mum, “ Why do you abandon me?” He looked down at the earth. The ground was much closer. Then something strange happened. The air caught behind his arms and he began to fly! He wasn’t moving to the ground any more. Instead, his eyes were pointed up at the sun. “You are flying! You can make it!” His mother smiled. (    )6. Which of the following is TRUE about the baby eagle’s life before his mother stopped coming to the nest? A. He lived in a nest in the tree.     B. His mother offered him nice food. C. He was always cold and hungry.      D. He lived very happily with friends. (    )7. How did the baby eagle feel as soon as he saw his mother coming again? A. Sad.              B. Happy.           C. Afraid.           D. Angry. (    )8. What did the baby eagle’s mother do when she came the last time? A. She put some food in the nest.       B. She just came to see him again. C. She shouted at he baby eagle and flew away. D. She pushed her baby eagle out of the nest. (    )9. What does the word “abandon” mean? A. 抛弃              B.保护             C.歧视            D. 拯救 (    )10. We can infer (推断) from the story that _____________. A. The baby eagle lost his mother B. The baby eagle fell down and died C. The baby eagle could get food himself D. The baby eagle was still angry with his mother
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【简答题】已知y=f(x)(x∈D,D为此函数的定义域)同时满足下列两个条件:①函数f(x)在D内单调递增或单调递减;②如果存在区间[a,b] D,使函数f(x)在区间[a,b]上的值域为[a,b],那么称y=f(x),x∈D为闭函数;请解答以下问题: (1)求闭函数y=-x 3 符合条件②的区间; (2)判断函数 是否为闭函数?并说明理由; (3)若y=k+ (k<0)是闭函数,求实数k的取值范围。
【简答题】对于定义域为D的函数y=f(x),若同时满足下列条件:①f(x)在D内单调递增或单调递减;②存在区间[a,b] D,使f(x)在[a,b] 上的值域为[a,b] ;那么把y=f(x)(x∈D)叫闭函数。 (1)求闭函数 符合条件②的区间[a,b] ; (2)判断函数 是否为闭函数?并说明理由; (3)判断函数 是否为闭函数?若是闭函数,求实数k的取值范围。
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A.
Pubic Const
B.
Option Explicit
C.
Explicit
D.
Option Base
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A.
5'-P和3'-P
B.
5'-OH和3'-P
C.
5'-P和3'-OH
D.
5'-OH和3'-OH
E.
任意两种
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A.
催化连接反应时既能以ATP又能以NAD作为能量来源
B.
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C.
是一种单肽酶,分子量为74kDa
D.
既能催化单链DNA连接又能催化双链DNA连接
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【单选题】《近代中国人日本观的变迁》是谁的著作?
A.
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B.
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C.
黄遵宪
D.
李大钊
【单选题】若要强制变量必须先定义再使用 , 应该使用的说明语句是 ( ).
A.
Public Const
B.
Option Explicit
C.
Explicit
D.
Option Base
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