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Children these days ________ their parents too much. They should learn to look after themselves.
10个月前
11个月前
For a small beginning, it has __________ (发展) into a big international company.
1年前
蝴蝶和蚊子的大小有很大区别,蝴蝶飞来时,人们往往觉察不到;而蚊子飞来时,却觉察到了它的存在.这是为什么呢?
1年前
求函数y=[sin2x+sin(2x+π/3)]/[cos2x +cos(2x+π/3)]的最小正周期
1年前