商品价值的实体是（）
A.使用价值
B.交换价值
C.具体劳动
D.抽象劳动
参考答案：D
184. In no time the locusts came down and started eating everything --- the wheat, the corn, the grass and even the _____ on the tree.
A．leaf
B．leafs
C．lemon
D．Leaves
为什么货币乘数会随市场利率水平而提高，随贴现率提高而下降
