已知 R 是实数集, 集合 A={x∈Z||x|<3}, B={x|2x 2 ﹣ x﹣ 3>0}, 则 A∩(∁ R B) =()

已知 R 是实数集, 集合 A={x∈Z||x|<3}, B={x|2x 2 ﹣ x﹣ 3>0}, 则 A∩(∁ R B) =()

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—What do you think of these two books?—_____ of them are interesting. And I’ve r

—What do you think of these two books?—_____ of them are interesting. And I’ve read them several tim

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如图,PM、PN是⊙O的切线,切点分别是A、B,过点O的直线CE∥PN,交⊙O于点C、D,交PM于点E,AD的延长线交PN于点F,若BC∥PM.(1)求证:∠P

如图,PM、PN是⊙O的切线,切点分别是A、B,过点O的直线CE∥PN,交⊙O于点C、D,交PM于点E,AD的延长线交PN于点F,若BC∥PM.(1)求证:∠P=45°;(2)若CD=6,求PF的长.

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—Will you be back ____ five in the afternoon?—I’m not sure, maybe later than tha

—Will you be back ____ five in the afternoon?—I’m not sure, maybe later than that.

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下列展开图中,不是正方体展开图的是()

下列展开图中,不是正方体展开图的是()

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