当建筑物层高超过（）m，在计算容积率时该层建筑面积加倍计算。
A.5
B.8
C.15
D.22
参考答案：B
According to the pure expectations theory, an upward-sloping yield curve implies:（）
A. interest rates are expected to decline in the future.
B. interest rates are expected to increase in the future.
C. longer-term bonds are riskier than short-term bonds.
潜水积极参与（），资源易于（）。
