正确答案: A
原始社会
题目:艺术活动产生于人类的______时期。 ( )
解析:A
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举一反三的答案和解析:
[单选题]The word "arid" is closest in meaning to ______.
dry
[单选题]中国植物群落分类的高级单位是( )
植被型
[单选题]下列生态因子中,对生物起间接作用的是( )
坡向
[单选题]Jonathan and Joe left the house to go for__ after supper.
a walk
解析:【考情点拨】考查固定搭配。 【应试指导】句意:晚饭后,乔纳森和乔离开了房子去散步。go for a walk是固定用法,意为“出去走走,去散步”,与take a walk同义。
[单选题]The article suggests that______.
our earth used to be part of a high mountain on the sun
解析:48.答案为D 从最后一段及its tidal pull had become so powerful that this mountain was torn to pieces and threw off small parts of itself into space可推断地球也是在太阳爆炸的小碎片中形成的。
[单选题]Some scientists believe that hibernation is started by ______.
a body chemical