作业面积应不小于( )m2，才能满足焊工安全作业要求。
A. 4
B. 5
C. 6
D. 7
The author's attitude toward the culture in most factories is best described as ______.
A. cautious
B. critical
C. disinterested
D. respeciful
化学清洗法适用于铝及铝合金大尺寸、单件生产工件的清洗。（）
A. 对
B. 错
In Chaisinthop's opinion, when working in a big company, one can ______.
A. get more experience in more areas
B. become more skilled with hardware
C. come to know 50 to 60 people easily
D. have opportunities to do bigger projects
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