问题
单项选择题
下列对焊媒的描述，错误的是
A．焊媒的作用是清除焊件、焊料表面的氧化膜
B．焊媒能改善熔化后焊料的润湿性
C．焊媒能降低被焊金属的熔点
D．焊媒的熔点及作用温度低于焊料
E．焊媒及其生成物比重应小，残渣易去除
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
下列对焊媒的描述，错误的是
A．焊媒的作用是清除焊件、焊料表面的氧化膜
B．焊媒能改善熔化后焊料的润湿性
C．焊媒能降低被焊金属的熔点
D．焊媒的熔点及作用温度低于焊料
E．焊媒及其生成物比重应小，残渣易去除
参考答案：C
短文改错（共8小题；每小题0.5分, 满分4分） 下面短文中有8处语言错误。请在有错误的地方增加、删除或修改某个单词。 增加：在缺词处加一个漏字符号（  ）, 并在其下面写上该加的词。删除：把多余的词用斜线（＼）划掉。 修改：在错的词下划一横线, 并往该词下面写上修改后的词。 注意：1. 每处错误及其修改均仅限一词； 2. 只允许修改8处, 多者（从第9处起）不计分
I'd like to tell you something about our school sports meeting. It was held on Oct.6, when was a fine day. There were over 1,000 students and teachers attend it. Wang Lin, a student from my class won the 100-meter race. He finish the race in 12.6 seconds and broke in the school record. The sports meeting was really success. That was because we were all trying to do our best. Although I was not one of the winner, I was proud of that we had done. Looking forward to receive your letter. |
say “yes”. I’ll arrive in Bristol at around 8 pm in Friday evening.