[题目]下列关于合金的叙述中正确的是( )A. 合金是由两种或多种金属熔合而成的B. 日常生活中用到的五角硬币属于铜合金C. 合金在任何情况都比单一金属性能优良D. 低碳钢比中碳钢强度高题目和参考答案——青夏教育精英家教网—

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【题目】下列关于合金的叙述中正确的是( )

A. 合金是由两种或多种金属熔合而成的

B. 日常生活中用到的五角硬币属于铜合金

C. 合金在任何情况都比单一金属性能优良

D. 低碳钢比中碳钢强度高

【答案】B

【解析】合金是金属与金属或金属与非金属熔合而成的，A项错误；合金的性能一般比单一金属性能优良，但并不是任何情况都是，如纯铝的导电性比铝合金要好，C项错误；含碳量高强度大，中碳钢比低碳钢强度高，D项错误。

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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，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下划一横线，并在该词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(从第11处起)不计分。

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A. that; what

B. what; that

C. when; what

D. when; that

【题目】短文改错

Nowadays，with the growing popularity of computers，students were paying less and less attention to handwriting.

According to a recently survey，many students don't want to improve their handwriting for various reason.52 percent of them think that they can just use a computer，so there was no need to waste time improving our handwriting.32 percent believe that they are too busy with the study that they have no time to practicing，and 16 percent think that practicing handwriting is useless.

As the saying went，writing style shows the man.Beautiful and neat handwriting is great benefit，especially for students.Therefore，in my opinion，the more importance should be attached to handwriting from now on.