答案:D
We never doubt that those who have a strong will can succeed _____. [ ]
A. on time
B. in time
C. at one time
D. at a time
如果数字显示仪器的分辨力为δx,则区间半宽度a=δx/2,可设为均匀分布,查表()。
A、k=0.5
B、k=
C、k=
D、k=0.29