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!高分演练!
全真模拟预测卷!一"
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########
#"
!"!八年级生物!下"
!
第"页"共%页# !"!八年级生物!下"
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第&页"共%页# !"!八年级生物!下"
!
第%页"共%页#
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答
$"
$
全真模拟预测卷"一#
&'*#%解析&#可以通过对生物化石的研究"推测生物进化的趋势"看出生物之间的亲
缘关系"估计生物的生存年代"但是通过化石无法知晓无机物能否形成有机物$
$'(#%解析&#马的进化趋势)体形由小变大"多趾着地逐渐变为中趾发达并唯一着地
!趾数减少#"四肢越来越长$ 对马化石的研究揭示出生物进化的长期性和渐变性$
+'*#,')#-'!
.'!#%解析&#从生物分类的角度来看"牛和马都属于动物界&脊索动物门&脊椎动物
亚门&哺乳纲"哺乳动物的最突出的特点是胎生哺乳$
/')#%解析&#被子