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【简答题】
如图，在△ABC中，D为AB边上一点，∠A=36°，AC=BC，AC 2 =AB×AD. （1）试证明：△ADC和△BDC都是等腰三角形； （2）若AB=l，求AC的长； （3）请你在下图的基础上构造一个等腰梯形，使得该梯形连同它的两条对角线得到8个等腰三角形（标明各角的度数）．
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举一反三
【单选题】.---Have you any letters ______, sir? I’m free this time. ---No, but thank you all the same.
A.
to type
B.
to be typed
C.
to be typing
D.
typed
【简答题】手工艺设计阶段的两个重要特点是什么？
【单选题】— — I'm afraid not. But I'll be free this afternoon.
A.
Is there any vacancy in your company?
B.
Do you have the time?
C.
Can you spare me a few minutes now?
【单选题】Thanks to the ________ of air transport, everyone is free to go anywhere at any time.
A.
effectiveness
B.
efficiency
C.
efficient
D.
effective
【单选题】I _____ to help you but I was not able to spare any time. I _____a paper last night and I’ll have to finish it today.
A.
wanted; have been writing
B.
had wanted; was writing
C.
had wanted; wrote
D.
have wanted; wrote
【单选题】–Do you have any time this afternoon? --Yes, ___________
A.
I have no time.
B.
I am free.
C.
That’s OK.
【单选题】I ________ to help you with your homework, but I couldn’t spare any time. I ________ a composition last night and I’ll finish it today.
A.
wanted; wrote
B.
had wanted; was writing
C.
have wanted; wrote
D.
wanted; have been writing
【简答题】5 free any I time. don’t have
【简答题】I hope you like my book and please feel free to make any comments and suggestions(翻译)
【单选题】I _____ to help you to do homework but I couldn’t spare any time. I _____ a composition last night and I’ll finish it today.
A.
wanted; wrote
B.
had wanted; was writing
C.
have wanted; wrote
D.
wanted; have been writing
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