Isogonic lines are lines on a chart indicating ______.
举一反三
- Isogonic lines are lines on a chart indicating （）. A: points of equal variation B: points of zero variation C: the magnetic latitude D: magnetic di
- Which of the following lines are used as dimension lines， extension lines， leader lines， construction lines， section lines and projection lines？（ ） A: Thin phantom lines B: Thin solid lines C: Thin center lines D: Wavy lines
- Mooring lines include head lines, stern lines, spring lines and breast lines.? 正确|错误
- How many lines does a product description usually have? A: 1-2 lines B: 4-6 lines C: 7-9 lines D: 10-12 lines
- 中国大学MOOC: Mooring lines include head lines, stern lines, spring lines and breast lines.