若坡度从10°增大到15°，则a点的数值将

【名词&注释】

抛物线、双曲线(hyperbola)、特征描述(feature description)、答题卡(answer sheet)

[单选题]若坡度从10°增大到15°，则a点的数值将

A. 增大
B. 减小
C. 先减小后增大
D. 先增大后减小

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学习资料：

[单选题]请阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡^{(answer sheet)}上将该选项的标号涂黑。A

A. One morning more than thirty years ago, I entered the Track Kitchen, a restaurant where everyone from the humblest( )to the most powerful came for breakfast.I noticed am empty chair next to an elderly, unshaven man, who looked somewhat disheveled. He was wearing a worn-out hat and was alone. I asked if I might join him.He agreed quietly and I sat down to have my breakfast.
B. We cautiously began a conversion and spoke about a wide rang of things. We never introduced ourselves. I was concerned that he might have no money and not be able to afford something to eat. So as I rose to go back to the counter and buy a second cup of coffee,I asked,
C. “My I get you something ?”
D. “ coffee would be nice.”
E. Then I bought him a cup of coffee, We talked more ,and he accepted another cup of coffee,Finally,I rose to leave,wished him well,and headed for the exit. t the door I met one of my friends. He asked,
F. “How did you get to know Mr. Galbreath?”
G. “Who?”
H. “The man you were sitting with. He is chairman of the Board of Churchill Downs.”
I. I could hardly believe it. I was buying, offering a free breakfast, and feeling pity for one of the world’s richest and most powerful men!
J. My few minutes with Mr. Galbreath changed my life. Now I try to treat everyone with respect, no matter who I think they are, and no matter another human being with kindness and sincerity.
K. 56. What does the underlined word “disheveled” mean?
L. . Unfriendly.
M. Untidy.
N. Gentle.
O. Kind.

[单选题]（10）到两互相垂直的异面直线的距离相等的点，在过其中一条直线且平行于另一条直线的平面内的轨迹是

A. 直线
B. 椭圆
C. 抛物线
D. 双曲线

[多选题]在下面关于柏科的特征描述中，正确的是( )。

A. 落叶木本
B. 叶条形或针形
C. 小孢子叶交互对生
D. 小孢子无气囊
E. 珠鳞交互对生或轮生

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