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【单选题】
若对被测样品了解甚少采取( ) 抽样方式。A.
系统
B.
指定代表性
C.
随机
D.
尽可能多
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】Many animals hide(躲藏) to stay alive. They hide in many ways. Some animals hide in leaves; some animals hide in snow. Usually their colors or shapes(形状) help protect them. It’s hard to see an Arctic be...
【单选题】Hunters have almost exterminated many of the larger animals while farmers destroyed many smaller animals.
A.
wounded
B.
reduced
C.
killed
D.
trapped
【简答题】You can see many animals them
【简答题】You can see many animals there.
【简答题】People can see many animals there.
【单选题】Animals are divided into many groups. Some groups of animals include the, insects, fish, amphibians, reptiles, birds and mammals. Insects are small animals that have six【21】legs and three body parts (...
A.
separated
B.
jointed
C.
connected
D.
stiff
【单选题】Many children may be fond of animals， but ever think of making the study of animals their career.
A.
a few
B.
few
C.
some
D.
any
【简答题】Many animals hide to stay alive. They hide in many ways. Some animals hide in leaves; some animals hide in snow. Usually their colors or shapes help protect them. It’s hard to see an Arctic bear in sn...
【简答题】阅读以下文字。完成下列问题。 ①我们这些总有一死的人的命运是多么奇特呀!我们每个人在这个世界上都只做一个短暂的逗留，目的何在，却无所知，尽管有的自以为对此若有所感。但是不必深思，只要从日常生活就可以明白：人是为别人而生存的——首先是那样一些人，他们的喜悦和健康关系着我们自己的全部幸福，然后是为许多我们所不认识的人，他们的命运通过同情的纽带同我们密切结合在一起。我们每天上百次地提醒自己：我的精神生活...
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