实行分时电价的用户应装设复费率电能表或多功能电能表。
参考答案:对
_______ you have made up your mind to lose weight, you'd better eat less in the evening. [ ]
A. Since
B. Although
C. Unless
D. Until
正弦规是利用()测量角度的一种精密量具。
A.三角法
B.倾斜角度法
C.量块对比法
D.百分表位移法