价值工程的功能评价方法有两类，包括功能成本法和( )。
A．方案估算法
B．功能指数法
C．强制确定法
D．多比例评分法
参考答案：B
在方程2x+y=4中，用x的代数式表示y是______．
Lai Changxing _____ Canada with his family before the policemen began to catch him. [ ]
A. had been to
B. has gone to
C. would go to
D. had arrived in
