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I&39;ll still unable to make myself ______ in the discussion, which worries me a lot. A) to be un

I was almost asleep last night when I suddenly heard someone ______ at the door. A) be knocking B

已知锐角α、β满足sinα=55，cosβ=31010，则α＋β等于()A．3π4B．π4或3π4C．π4D．2kπ＋3π4(k∈Z)

At the international conference, the famous scientist gave an excellent report ______ on his recent

一元二次方程mx2＋(2m－3)x＋(m－2)=0的两个实数根为tanα和tanβ．(1)求实数m的取值范围；(2)求tan(α＋β)的取值范围

They accused their government ______ betraying the interests of the people. A) about B) on

已知α，β∈(3π4，π)，sin(α＋β)=－35，sin(β－π4)=1213，则cos(α＋π4)=()A．1665B．5665C．－5665D．－1665

He doesn&39;t feel like ______ a picnic in the park this weekend, hand he suggested watching the fo

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The conference ______ in Beijing next week is bound to be a great success. A) holding B) being

若cosxcosy＋sinxsiny=13，则cos(2x－2y)=______．

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设f(x)=sin4x－sinxcosx＋cos4x，则f(x)的值域是______．

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______ late for class next time. A) Be not B) Don&39;t C) Don&39;t be D) Not be

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