题目：
压缩空气管道接支管时，应从（）开孔，避免凝结水流入支管。
A.上部
B.底部
C.侧面
D.任意位置。
答案：
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参考答案：德育任务、德育内容与受教育者原有的思想品德发展水平之间矛盾，是德育过程的基本矛盾。
压缩空气管道接支管时，应从（）开孔，避免凝结水流入支管。A.上部 B.底部 C.侧面
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