甲圆的半径等于乙圆的直径,甲圆的周长是乙圆的( ),乙圆的面积是甲圆的( )。
2倍;
— You look upset. What's the matter?
— I had my proposal _____ again. [ ]
A. turned over
B. turned on
C. turned off
D. turned down
数量指标总指数()的变形公式是()。
A.
B.
C.
D.
E.