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They want to know ____ do to help the suffering people in the earth-stricken area. [ ]
1年前
I like ________ basketball. [ ] A.to play B.playing C.playing the
1年前
已知平面内动点P到点F(1,0)的距离比点P到直线X=-2的距离小1.求点P的轨迹方程
1年前
look !he is ___(dance)over there
1年前
知数列an满足a1=4 an=4-4/an-1(n大于等于2) 令bn=1/[(an)-2] 求证bn是等差数列 求数列an的通项公式
1年前