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> 17世纪,范·海尔蒙特将2.5kg的柳树种于100kg土中,5年中只浇水,5年后称重,柳树重82.5kg,土重约99.9㎏,由此得出绿色植物生长所需的物质主要是[]A.二氧化碳B.氧气C.水D.-七年
17世纪,范·海尔蒙特将2.5kg的柳树种于100kg土中,5年中只浇水,5年后称重,柳树重82.5kg,土重约99.9㎏,由此得出绿色植物生长所需的物质主要是[]A.二氧化碳B.氧气C.水D.-七年
题目简介
17世纪,范·海尔蒙特将2.5kg的柳树种于100kg土中,5年中只浇水,5年后称重,柳树重82.5kg,土重约99.9㎏,由此得出绿色植物生长所需的物质主要是[]A.二氧化碳B.氧气C.水D.-七年
题目详情
17世纪,范·海尔蒙特将2.5kg的柳树种于100kg土中,5年中只浇水,5年后称重,柳树重82.5kg,土重约99.9㎏,由此得出绿色植物生长所需的物质主要是
[ ]
A.二氧化碳
B.氧气
C.水
D.无机盐
题型:单选题
难度:偏易
来源:同步题
答案
C
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题目简介
17世纪,范·海尔蒙特将2.5kg的柳树种于100kg土中,5年中只浇水,5年后称重,柳树重82.5kg,土重约99.9㎏,由此得出绿色植物生长所需的物质主要是[]A.二氧化碳B.氧气C.水D.-七年
题目详情
B.氧气
C.水
D.无机盐
答案