每回收1吨废钢铁可炼好钢多少吨？（）
A、0.4
B、0.5
C、0.8
D、0.9
参考答案：D
---Dad. Could I have an MP5 like this?
---Certainly. We can buy ______ one, but as good as this one.
A．a cheap
B．a cheaper
C．a cheapest
D．the cheapest
物权的继受取得包括（）
A、买卖
B、赠与
C、继承
D、互易
