导线绝缘恢复包缠时，使黄蜡带与导线保持45度倾斜角。
查看答案
热缩管紧固的导线具有防水的特性。
A. 对
B. 错
The writer tried a MOOC that his friend suggested because it was cheap and possible ________.
A MOOC is a course in which you may find a lot of subjects and _________to know what the course is like.
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