G91 G02 X20.0 Y20.0 R-20.0 F100执行前后刀所在位置的距离为()。
A.0
B.20
C.28.28
D.40
参考答案:C
每句话有一处错误,请在错误下面划线并将写出正确答案
小题1:I’m glad to know that you had an interest in Chinese food.
小题2:Not only the students but also the teacher like the film.
小题3:I will like to know where you were born.
小题4:Growing up is not easy__ sometimes all that is need is someone to rely on .
小题5:Personally, I found most lesson rather uninteresting.
小题6:He is on good term with me.
小题7:She was usual patient with her students and never made them disappointed.
小题8:They came back lately and had some tea .
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小题10:Today I was having a PE lesson while I fell down and hurt my foot.
若在同一温度下湿空气的相对湿度减少,其物料的平衡水分也随之减少。