单选题:下列实验操作中需要用玻璃棒的是()。①过滤 ②蒸发 ③溶解 ④蒸馏 ⑤萃取A①②③B②③④C③④⑤D①④⑤

题目内容:

下列实验操作中需要用玻璃棒的是()。

①过滤 ②蒸发 ③溶解 ④蒸馏 ⑤萃取

A①②③

B②③④

C③④⑤

D①④⑤

答案解析:

下列说法中,正确的是( ) A二氧化硅可用来制造太阳能电池B需要加热才能进行的反应一定是吸热反应C铜的金属性比铝弱,可以用铜罐贮运浓硝酸DNaOH溶液不能保存在

下列说法中,正确的是( ) A二氧化硅可用来制造太阳能电池B需要加热才能进行的反应一定是吸热反应C铜的金属性比铝弱,可以用铜罐贮运浓硝酸DNaOH溶液不能保存在带磨口玻璃塞的试剂瓶中

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