问题
单项选择题 A1/A2型题
支撑相占步行周期的（）
A.20%
B.40%
C.50%
D.60%
E.80%
答案
参考答案：D
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支撑相占步行周期的（）
A.20%
B.40%
C.50%
D.60%
E.80%
参考答案：D
One Saturday afternoon, my daughter Alice asked me, “Are all people the same even if they are different in color?” I thought for a minute, and then I said, “I’ll explain, 36 you can just wait until we make a quick 37 at the grocery store（杂货店）. I have something 38 to show you. ” At the grocery store, we 39 some apples --- red, green and yellow ones. Back home, I told Alice, “It’s time to 40 your question.” I put one apple of each 41 on the table. Then I looked at Alice, who had a 42 look on her face. “People are like apples. They come in all 43 colors, shapes and sizes. On the 44 , some of the apples may not 45 look as the others. ” As I was talking, Alice was 46 each one carefully. Then, I took each of the apples and peeled（削皮）them, 47 them back on the table, but 48 a different place. “Okay, Alice, tell me which is which.” She said, “I 49 tell. They all look the same now. ” “Take a bite of 50 . See if that helps you 51 which one is which. ” She took 52 , and then a huge smile came across her face. “People are 53 like apples! They are all different, but once you 54 the outside, they’re pretty much the same on the inside. ” She totally 55 it. I didn’t need to say or do anything else.
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