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【单选题】
(p. 21) The first time Alexis went to take golf lessons, she had a golf pro who was very patient with her and who was able to pinpoint what she was doing wrong without making her feel uncoordinated. Her second golf lesson was not nearly as helpful. The golf pro who gave the lesson wanted Alexis to watch what he was doing and imitate his swing. He was unable to verbalize his instructions. Alexis's experience with the two golf instructors illustrates the _____ of service.A.
Intangibility
B.
Heterogeneity
C.
Simultaneous production and consumption
D.
Perishability
E.
Divisibility
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【简答题】Dolores Huerta has worked hard most of her life to help other people. She has helped change things so that farm workers can have a better life. Dolores grew up in California. She was a good student an...
【简答题】已知关于x的方程x 2 -7x+k=0（*）． （1）请你选择一个合适的整数k，使得到的方程有两个不相等的实数根，并说明它的正确性． （2）如果方程（*）的两个实数根x 1 ，x 2 的值恰好是一个菱形的两条对角线长且满足 x 1 2 x 2 2 - x 1 2 - x 2 2 -2 x 1 x 2 =95，求该菱形的面积．
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