题目内容

Questions 15 to 17 are based on a talk on student housing. You now have 15 seconds to read Questions 15 to 17. What do the married student apartments not allow

A. Children.
B. Cooking.
C. Spouses.
D. Single students.

查看答案

搜索结果不匹配？点我反馈

更多问题

焊接过程中，当电弧长度改变时，主要是弧柱长度发生变化。( )

A. 对
B. 错

采用碳棒在焊件上试焊，如果试焊时碳弧燃烧稳定，电弧被拉起很长也不断弧，而且在断弧后，碳棒端面光滑，此种接法为直流反接。( )

A. 对
B. 错

pollution can be controlled by increasing the production cost of polluting goods

碱性焊条引弧时，采用直击法引弧，可以避免在焊缝中产生气孔。( )

A. 对
B. 错