内浮顶罐的（）随液面的升降而升降。
参考答案：浮顶
按季度资料计算的季节指数Sj的取值范围为（）
A.0≤Sj≤4
B.0≤Sj≤1
C.0≤Sj≤12
The diagonal of the floor of a rectangular closet is
feet. The shorter side of the closet is
feet. What is the area of the closet in square feet
feet. The shorter side of the closet is 
feet. What is the area of the closet in square feet