中央银行能够独自控制货币乘数的大小。
参考答案：错
— Have you ever visited the Opera House?
—Yes．When I was in Sydney, I ______ it twice．
A．have visited
B．visited
C．had visited
D．would visit
下列现象中，能说明物体具有惯性的是[ ]
A.
B.
C.
D.
