A:v(A)=0.5 mol•L﹣1•s﹣1
B:v(B)=0.3 mol•L﹣1•s﹣1
C:v(C)=0.8 mol•L﹣1•s﹣1
D:v(D)=30 mol•L﹣1•min﹣1
被称为北半球“寒极”的是 ( )
Here _______ your key. ( )