下列误差属于系统误差的是（）。
A.对中误差
B.读数误差
C.钢尺检定误差
D.照准误差
参考答案：C
审美器官与动物性器官有何不同？
— What do you like doing?
— I love . [ ]
A. playing the football
B. playing football
C. play football
D. play the football
