下列不属于正轴测图的是( )。
A．正二轴测图B．正三轴测图C．正四轴测图D．正等轴测图
参考答案：C
I know he hasn’t finished his homework, but ______, he has done his best.
A．at all
B．in all
C．after all
D．above all
为什么反气旋中心气压梯度小？
