如果A点不是帕累托最优(即不在契约曲线上),B点是帕累托最优,那么从A点到B点的移动一定是帕累托改进。
参考答案:错
The Parkers bought a new house, but will need a lot of work before they can move in.
A.they
B.it
C.one
D.which
下列试剂中不会导致蛋白质变性的是
A.尿素B.苦味酸C.热丙酮D.硫酸铵E.二氯化汞