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【单选题】
下列有关茶叶的内含物质的描述，不正确的是：A.
一般来说，同类茶叶的嫩茶比老茶维生素含量高。
B.
茶叶中的芳香物质，有的可以分解脂肪，有的可以调节神经系统。
C.
氨基酸是茶叶保持鲜爽口感的物质，含量越好，口感越好。
D.
同等单位咖啡中的咖啡碱含量比茶叶中的含量高出许多。
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A.
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B.
The Survival of Mankind
C.
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D.
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【单选题】How did researchers know that ancient Greeks rushed to watch the Olympics?
A.
Thousands of people came to watch.
B.
The main stadium is still not big enough.
C.
They have found the related record of events.
D.
Many of them were visitors and pilgrims.
【简答题】已知：如图，直线 交⊙O于A、B两点，AE是⊙O的直径，点C为⊙O上一点，且AC平分∠PAE，过C作 于D. 小题1:求证：CD为⊙O的切线； 小题2:若DC+DA=6，⊙O的直径为10，求AB的长.
【简答题】写出图(a)梯形图编程的指令表编程，并画出程序运行时的时序波形图。
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