【单选题】Condition of self-lock for screw is .A.lead angle ≤ equivalent frication angleB.lead angle ≤ frication angleC.lead angle ≥ frication angle D.lead angle ≥ equivalent frication
A.
lead angle ≤ equivalent frication angle
B.
l ead angle ≤ f rication angle
C.
l ead angle ≥ f rication angle
D.
l ead angle ≥ e quivalent frication
【简答题】What 's the first camera angle ?
【判断题】The multiview projection method in China is first angle projection.
【单选题】What’s the problem if the first person adjusts the angle?
A.
The work can’t be finished at all.
B.
The second person can’t match it.
C.
The third person can’t match it.
D.
The boss don’t want to do that.
【简答题】什么是早期胃癌?并列举其肉眼和镜下的类型。
【单选题】In the navigational triangle,the angle at the elevated pole is the ______.