人类向文明迈进的重要标志是[]A．直立行走B．火的使用C．制造工具D．语言的产生-八年级生物

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• 人类学家把下列哪项作为人与猿分界的重要标准之一[]A．脊椎由弓形变成“S”形B．直立行走C．下肢增长D．骨盆变短增宽-七年级生物
• 下列动物中，不属于现代类人猿的是[]A．黑猩猩B．大猩猩C．长臂猿D．金丝猴-八年级生物
• 人和类人猿的共同祖先是[]A．森林古猿B．长臂猿C．猕猴D．黑猩猩-八年级生物
• 下列关于人类由来的说法中，不正确的是[]A．人类起源于几百万年前B．人类不是“上帝”创造的C．人类是由类人猿进化来D．“露西”是古人类的一员-七年级生物
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• 在唐朝的皇宫，宫女会在夏天推动水车将水洒在宫殿的房顶上，水再沿房顶的四周流下，这样做的主要目的是[]Ａ．为了增加一道风景Ｂ．为了新奇Ｃ．为了清洁房顶Ｄ．为了降温-八年级物理
• 2009年入秋以来，我国西南地区遭遇百年特大旱灾，政府部门多次实施人工降雨，对缓解旱情起到一定的作用。向云层中投撒干冰是人工降雨的方法之一，被投撒到云层中的干冰很快为-九年级物理
• 如下图所示在试管内装些水，用橡皮塞塞住，加热使水沸腾，会看到橡皮塞被___________，同时管口出现“白雾”，这是管内水蒸气___________形成的。在这个过程中，水蒸气的_____-九年级物
• 在舞台上喷撒干冰（固态二氧化碳）可以产生“白云”，使舞蹈演员好像在云中飞舞，舞台上的这种“白云”是：[]A．干冰迅速升华形成的二氧化碳气体B．干冰迅速熔化后再蒸发形成的二氧化-八年级物理
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