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下图中甲乙、丙反映了三类工厂的投入构成情况。据此完成1～3题． 1、按主导因素划分，甲类工厂代表的工业类型是 [ ] A．市场导向型 B．劳动力导向型 C．原料导向型 D．动力导向型 2．乙类工厂运费低的原因最不可能是 [ ] A．需要的原料和能源少 B．产品科技含量高 C．以航空运输为主 D．靠近原料地和消费市场 3．现阶段，丙类工厂宜布局在我国 [ ] A．环渤海地区 B．长江三角洲地区 C．珠江三角洲 D．中、西部地区
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【简答题】已知函数f（x）=e x +ax，g（x）=e x lnx（e是自然对数的底数）． （1）若曲线y=f（x）在x=1处的切线也是抛物线y 2 =4（x-1）的切线，求a的值； （2）当a=-1时，是否存在x 0 ∈（0，+∞），使曲线C：y=g（x）-f（x）在点x=x 0 处的切线斜率与f（x） 在R上的最小值相等？若存在，求符合条件的x 0 的个数；若不存在，请说明理由．
【单选题】Knitting My mother knew how to knit (编织), but she never taught me. She assumed, as did many women of her generation, that knitting was no longer a skill worth passing down from mother to daughter. A c...
A.
Because their mothers didn't teach them.
B.
Because they were influenced by feminism and consumerism.
C.
Because they were feminists.
D.
Because they were consumerists.
【简答题】蛋白质的二级结构是指多肽______的局部空间排列,不涉及氨基酸残基侧链的构象,其主要形式包括______。
【单选题】爱情是男女之间基于一定的社会基础和共同的( ),在各自内心形成的相互倾慕,并渴望对方成为自己终身伴侣的一种强烈、纯真、专一的感情。
A.
社会理想
B.
生活理想
C.
学习目标
D.
物质追求
【简答题】设ρ＝ρ(x)是抛物线 上任一点M(x，y)(x≥1)处的曲率半径，s＝s(x)是该抛物线上介于点A(1，1)与M之间的弧长，计算 的值．(在直角坐标系下曲率公式为 )
【单选题】Knitting My mother knew how to knit(编织), but she never taught me. She assumed, as did many women of her generation, that knitting was no longer a skill worth passing down from mother to daughter. A co...
A.
Because their mothers didn't teach them.
B.
Because they were feminists.
C.
Because they were influenced by feminism and consumerism.
D.
Because they were consumerists.
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