—How often do you playtennis? —Twice________ week. And Ioften play it in________

—How often do you playtennis? —Twice________ week. And Ioften play it in________ sports center in ou

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You play with fire, Tom. Its dangerous.

You play with fire, Tom. Its dangerous.

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甲、 乙两人进行乒乓球比赛, 比赛打满2k(k ∈ N ∗ )局, 且每局甲获胜的概率和乙获胜的概率均为0.5.若某人获胜的局数大于k, 则此人赢得比赛. 下列

甲、 乙两人进行乒乓球比赛, 比赛打满2k(k ∈ N ∗ )局, 且每局甲获胜的概率和乙获胜的概率均为0.5.若某人获胜的局数大于k, 则此人赢得比赛. 下列说法正确的是( )

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The biggest challenge weall face is to prevent further environmental disasters.

The biggest challenge weall face is to prevent further environmental disasters. We ________ take act

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—________ you help me with my spoken English? —No problem.

—________ you help me with my spoken English? —No problem.

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