仪表示值的基本误差不超过测量量程的±0.5%,指的是()上。
A.检定点
B.终点
C.量程的任一分度点
D.经常使用的范围
参考答案:C
To be ______ changing times you cannot have your body in the 21st century and your head back in the past.
A.in step with
B.in front of
C.together with
D.apart from
已知xy=yx,则y’=()。