准确度和误差都是表征测量仪表所测量的结果与被测量()之间吻合程度的。
A、设定值
B、近似值
C、真值
D、实验值
参考答案:C
I ____________ playing the piano, but my brother ____________. [ ]
A. like, don't
B. likes, doesn't
C. like, doesn't
风力发电可供电网达不到的( )等地区使用。
A.边远农村;
B.小城镇;
C.牧区;
D.海岛。