下列产品的开发利用与保护环境无关的是_刷题宝

题干

下列产品的开发利用与保护环境无关的是（）

A：无磷洗衣粉

B：无氟冰箱

C：加碘食盐

D：无铅汽油

上一题下一题 0.0难度选择题更新时间:2019-11-06 06:39:22

答案(点此获取答案解析）

B

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下列说法中错误的是（）

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某生物兴趣小组的同学为探究植物的生命活动，设计了以下实验装置。请据图分析回答下列问题：

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These are __________ books .Please give ________ to __________ .

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阅读理解

Tom,Bill and Dave lost their backpacks．They are at the lost and found office．The backpacks are the same(相同的),but the things in them are different．Can you help them find the right(正确的)backpack?

Tom：I have a maths book and a pencil case in my backpack．There are three pencils,a pen and an eraser in the pencil case．

Bill：I have a Chinese dictionary,a maths book and two notebooks in my backpack．

Dave：There are two CDs,three picture books in my backpack．My English book is also in it．

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黄土高原主要位于黄河的（）

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