问题 选择题

下列关于物质用途说法不合理的是(   )

A.稀硫酸可用于中和印染厂的碱性废水

B.烧碱可用于调节土壤的酸性

C.碳酸氢钠可用于焙制糕点

D.氯化钠可用于消除公路积雪

答案

答案:B

题目分析:根据已有的知识进行分析。

A.稀硫酸能与印染厂的碱性废水发生中和反应而将其除去,正确;

B.烧碱虽然能与土壤中的酸性物质发生中和反应,但由于其本身具有强烈的腐蚀性,故不能用于调节土壤的酸性,错误;

C.碳酸氢钠是发酵粉的主要成分之一,故碳酸氢钠可用于焙制糕点,正确;

D.氯化钠是融雪剂的主要成分之一,故可用来消除公路上的积雪,正确。故选B

点评:物质的性质决定物质的用途,熟记常见物质的性质,是解答此类题的关键。

完形填空

阅读下面对话,掌握其大意,并根据所给首字母的提示,在标有题号的右边横线上写出一个英语单词的完整、正确形式,使对话通顺。

W:Oh,did you really like it?

M:Yes,very much.It was excellent!

W:Well,thank you for(77)s________ so.                                                    77.              

M:In fact,could I (78)a_________you for the recipe(烹饪方法)?                 78.              

W:  (79)S_________.It’s really very easy                                                 79.              

(80)F_________,mix together one egg, two teaspoons of salt,                 80.              

and two pounds of ground beef.(81)T__________,add twelve                      81.              

ounces milk an a cup of bread crumbs(面包屑). Are you with me so far? 

M:Yes,I’m with you

W:Okay.(82)N___________,put the mixture into a baking pan And              82.              

(83)a_________that,bake an hour and fifteen minutes at 350 degrees.        83.              

M:Wait a minute!I didn’t get the last (84)s________.Could you repeat          84.              

that part?

W:Sure.Bake an hour and fifteen minutes at 350 degrees.

M:Now I’ve got it.Is that it?

W:Yes.That’s it!

M:Thanks very much.

W:My(85)p____________.                                                                       85.              

问答题 简答题