2002年中国广告业营业额平均增幅为()
A.13.62%
B.21.52%
C.18.62%
D.15.52%
参考答案:A
The width of a rectangle is 6 cm less than the length. If the perimeter of the rectangle is 48 cm, what is the length of the rectangle in centimeters ?()
A.48
B.15
C.12
D.9
E.6
下列不属于内分泌系统的是()
A.生殖腺
B.胰腺
C.黄体
D.垂体
E.松果体