问题
选择题
将函数y=2x2向左平移一个单位，再向上平移3个单位后可以得到（ ）
A．y=2（x+1）2+3
B．y=2（x-1）2+3
C．y=2（x-1）2-3
D．y=2（x+1）2-3
答案
根据图象平移的法则可知，将函数y=2x2向左平移一个单位，得到y=2（x+1）2，
再向上平移3个单位，得到y=2（x+1）2+3．
故选A．
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将函数y=2x2向左平移一个单位，再向上平移3个单位后可以得到（ ）
A．y=2（x+1）2+3
B．y=2（x-1）2+3
C．y=2（x-1）2-3
D．y=2（x+1）2-3
根据图象平移的法则可知，将函数y=2x2向左平移一个单位，得到y=2（x+1）2，
再向上平移3个单位，得到y=2（x+1）2+3．
故选A．
A boy lost his arms in an accident and had to depend on his brother for almost everything. His younger brother became his 1 , never leaving him alone for years. Except for writing with his 2 , he was completely unable to do anything in his life. One night, his brother accompanied him into the 3 and went back to wait. But being so tired, his younger brother fell 4 , leaving him in the toilet for two hours. As the two brothers grew 5 , they had different opinions about many things and often 6 . His brother wanted to 7 from him to live his own life. Knowing this, he was heart-broken and didn't know what to do. A similar misfortune happened to a girl. One night her 8 , who suffered from mental illness, 9 . So her father went out looking for her mother, leaving her alone at home. She tried to 10 a meal for her parents, but only to overturn the stove, resulting in a 11 , which took her hands away. Though her elder sister, who was studying in another city, showed her 12 to help her, she made up her mind to be completely 13 . And she made it. One day, the boy and the girl were both 14 to appear on a television interview program. They both were asked to 15 something on a piece of paper with their toes. The boy wrote: My brother's arms are my arms; while the girl wrote: Broken wings, flying hearts.
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