（）反映了由债权人提供的资本与所有者提供的资本之间的对应关系。
A.资产负债率
B.产权比率
C.有形净值债务率
D.流动比率
参考答案：B
It is well-known that ____ year 2006 saw many developments in ____ science and technology, with those in the field of space science being particularly notable.
A．/; /
B．the; /
C．the; the
D．/; the
如图是白炽灯泡铭牌提供的信息，下列说法中正确的是
A．灯泡的额定电压是220V
B．灯泡的额定电压是25V
C．灯泡的额定功率是220W
D．灯泡的实际功率是25W
