装机容量与发电量各指什么？
参考答案：装机容量是指每秒钟所能发出的额定电量，即功率；而发电量是指发电机在一定时期内的实际功率与时间的乘积。
甲与乙签订了采购10t水泥的采购合同，合同约定由乙向甲交付8t，乙向丙交付2t。这种情况表现为( )。
A．债务承担
B．债务人向第三人履行债务
C．债权转让
D．由第三人向债权人履行债务
176. --- I didn’t know you were good friends.
--- You ______. I have known her since she moved here. You were studying aboard then.
A．may have
B．needn’t have
C．wouldn’t have
D．must have
