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【单选题】
科学的本质是创新，那些变不可能为可能的发现，树立了科学史上一个又一个里程碑，比如19世纪有机尿素的合成，打破了“有机物只有靠动植物的生命力才能合成”的思想禁钢。但当我们自信能够通过合成超出自然的物质去战胜自然时，也应反思这些物质对健康、环境的反作用，毕竟它们改变着我们的衣食住行。 这段文字意在说明( )。A.
不应过于迷信科技的作用
B.
应对合成技术进行全面评估
C.
应全面审视科技对人体及环境的影响
D.
科技改变了人类的生活及人类的思维方式
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【多选题】农业保险合同依据保险标的不同进行分类,通常可以分为( )
A.
种植业保险合同
B.
养殖业保险合同
C.
水产养殖保险合同
D.
林木保险合同
E.
农机具保险合同
F.
农房保险合同
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【单选题】所谓内接多边形是( )
A.
多边形在圆内，多边形每边的中点在圆上
B.
多边形在圆外，多边形的顶点在圆上
C.
多边形在圆内，多边形的顶点在圆上
D.
多边形在圆外，多边形每边的中点在圆上
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