题目内容
操作时不得将皮肤暴露在弧光下，以防灼伤皮肤。（ ）
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焊条电弧焊属于压焊。（ ）
试简述焊接的主要特点。
试简述焊接过程中常见的缺陷。
Underline the object clauses in the following sentences.1. Last year I decided I'd like to study psychology.2. I was about to give up when a friend suggestedthat I try a MOOC.3. At first, I had no idea what they were talking about, but they explained that a MOOC is a Massive Open Online Course, which is designed so that anyone can follow it, regardless of age, location or education — all you need is an Internet connection. You can search for hundreds of different subjects, and can usually watch a short introduction video to get an idea ofwhat the course is about.4. Most MOOCs have online forums too, where students can discusswhat they are learning.5. Research shows that 90% of students who start a MOOC do not finish it, and I can see why.
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