A. 绘制单点或多点 B. 定距等分直线、圆弧或曲线 C. 等分角 D. 定数等分直线、圆弧或曲线
A. 正确 B. 错误
A. start the engine in cold weather B. aid in helping personnel breathe C. prime the sprinkler system D. prime the air supply
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