题目内容

酸性焊条的工艺性比碱性焊条的工艺性好。（）

A. 对
B. 错

查看答案

搜索结果不匹配？点我反馈

更多问题

碱性焊条的电弧稳定性比酸性焊条好。（）

A. 对
B. 错

Exercise 1Column A: build, waste, oral, potential, raiseColumn B: presentation, confidence, money, problem, timeStudents communicate their information via an ____and a written report.

We help our client ____and competence to success in the English world.

Don’ t ____on computer games.