当数控机床的手动脉冲发生器的选择开关位置在X100时，手轮的进给_爱下问搜题

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问题单项选择题

当数控机床的手动脉冲发生器的选择开关位置在X100时，手轮的进给单位是（）。

A、0.1mm/格

B、0.001mm/格

C、0.01mm/格

D、1mm/格

答案

参考答案：A

选择题

-(x2+3x)=2，x²+3x为（　　）

完形填空

English was always my favorite subject. In my freshman year of high school, I could write a killer composition. In my second year, my 36 allowed me to give spelling tests to the class. I had wonderful 37 of my junior year. Mrs. Alexander 38 me to sit at her desk and take over the class when she had to leave the room. Only my senior English class was 39 , as we had a teacher right out of college who expected college-level work. Every student received a “C” or “D” grade the first quarter. 40 English was still my subject.
I graduated from high school, 41 early and had children. Confident about my English, I often helped my kids with their English homework. And I 42 long articles and beautiful poetry as a columnist for a newspaper. Fifteen years later, I went to college, and because I had been an "A" student, I remained an ‘‘A” student. I 43 up to my own expectations.
Yesterday, I 44 my high school report cards when I was reading old papers. That bundle of report cards 45 back the old days. I remembered sitting in my advisor's office，explaining that I had always excelled at English, and 46 that I did not deserve a “D” from that 47 teacher of my senior year. The advisor was sympathetic but unable to change a (an) 48
Reading 49 my old report cards revealed something else too. I wanted to tore them or hide them. I was not an ‘‘A” student in high school English！Somehow, I had 50 myself of this，when the grades clearly reflected an 51 student with an occasional “ A ” or ‘‘ B” but mostly “C” s.
Had I lived up to those grades and 52 myself according to those letters，I would have never confidently sought my writing 53 . Had I believed in my early grades instead of myself，I would have allowed my fear of 54 to defeat my enthusiasm and damage my creativity. 55 ，I viewed my younger self as an “A” English student, except for that undeserved “D”.

A．impressions

C．inspirations

C．disappointing

D．controversial

B．guaranteeing

C．complaining

D．recommending

C．inexperienced

D．independent

B．enthusiastic

C．outstanding