资产价值的高低主要取决于它能为其所有者或控制者带来的预期收益量的多少。
参考答案：对
－I think students should be allowed _______ homework with friends.
－I disagree. They talk instead of ________ homework.
A．do, doing
B．to do, to do
C．to do, doing
D．doing, to do
影响初级净生产力的因素有那些？
