正确答案: D

读取滴定管内液体的体积，俯视读数导致读数偏小

题目：有关实验的叙述，正确的是

解析：

A项容量瓶不能用来直接盛装固体配置溶液，要将固体先在烧杯中溶解，冷却至室温转移到容量瓶中，A项错误；B项pH不能润湿，润湿后会改变待测夜的浓度，从而测定不准，B项错误；C项进行焰色反应时铂丝用浓盐酸洗涤并灼烧，如用NaOH洗涤会使NaOH粘附在铂丝上，干扰检验其它金属元素的焰色反应，C项错误；D项正确。

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举一反三的答案和解析：

[单选题]Now that we\'ve discussed our problem, are people happy with the decisions_________？

taken

[单选题]毛茛科的( )是一适应风媒传粉的类群。

铁线莲属

[单选题]53____

floating

[单选题]回答听力部分时，请先将答案标在试卷上，听力部分结束前，你将有两分钟的时间将你的答案转涂到客观答题卡上。第一节（共5小题：每小题1.5分，满分7.5分）

Work on her paper.

[单选题]Which of the following is TRUE about the plan?

It may not benefit all the young people.

[单选题]聚药雄蕊是哪一科植物的主要特征?( )

菊科

[单选题]根据文章，回答 60～63 问题BIt was the first mow of winter -- an exciting day for every, child but not for most tether. Up until now, l had been able to dress myself for recess(课间休息), but today I would need some help. Miss Finlayson, my kindergarten teacher at Princess Elizabeth School near Hamilton, Ontario, had been through first snow days ,tony times in her long career, but I think struggled still remember this one.

the jacket and the boots