搜题
王老师:19139051760(拨打)
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第1题

单选(2分) Mrs. Black and didn.t look up when her husband entered the room. 得分/总分 A. went on writing.
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第2题

（ ）.若f(χ)在χ=χ0处可导，并且1，则1inh→0f(χ0+3h)-f(χ0)/h=(本题1.5分) A、3 B、-3 C、 1 D、 -1
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第3题

（ ）.微分方程y＇=e²χ-y满足初始条件y(0)=0 A.y=1n(1-e²χ)-1n2 B.y=1n(1-e²χ)+1n2 C.y=1n(1+e²χ)-1n2 D.y=1n(1+e&
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第4题

New Material Can Cool Buildings Researchers at Stanford University have developed a new material that can move heat o
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