中国大学MOOC: When dimensioning the size which is not made of full scale, we need calculate the dimension figure carefully according the scale.

Select the better figure when considering dimensioning rule.[img=269x189]1803a0cd800d40d.png[/img] A: (1) B: (2) C: all good D: all not good

When dimensioning an angle, how should the dimension number of the angle be written? A: Write it horizontally (with its prefix up) B: Write it vertically (with its prefix to the left) C: Write it perpendicular to the dimension line D: You can write it any way you like