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问题 问答题 简答题

氯化硅固砂法的机理如何？

答案

参考答案：

将液态四氯化硅汽化并加入到高压的氮氯流中，再注入地层中，气态四氯化硅与地层水反应生成二氧化硅的盐酸，胶结剂二氧化硅可将松散的砂粒固结。SiCl4+2H2O→SiO2（胶体）+4HCl

改错题

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多两处。错误涉及一个单词的增加、删除或修改。

增加: 在此处加一个漏字符号（∧），并在其下面写出修改的词。

删除: 把多余的词用斜线（＼）划掉。

修改: 在错的词下划一横线，并在其下面写出修改后的词。

注意: 1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者（从11处起）不计分。

Grandma Moses was crazy about painting soon before she picked it up and worked hard at it．She painted careful and her works were nice．She first painted only to please oneself, and then began to sell her works with a little money．In 1993, a collector, Louis Caldor happen to see several of Grandma Moses’ work hanging in a shop．He liked them, buying them at once, and set out to look for less．Caldor held a show to introduce the works of Grandma Moses other artists．Grandma Moses, who was world-famous, was died on December 13, 1961, at the age of 101．
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单项选择题

甲捡到了一只母山羊饲养起来，并在良种站花钱为母山羊配种，此后母山羊生了两只小山羊，后失主乙找到甲要羊。本案应如何处理( )

A．失主无权要回山羊

B．母山羊归还失主，小山羊归甲

C．大小山羊全归还失主，失主付给甲饲养费和配种费

D．大小山羊全归还失主，失主付给甲配种费但不付饲养费
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