出自:安徽广播电视大学-机电一体化技术

_______ in this exam, you will let your parents down. A、When fail B、Failing C、If you fail
A new museum _______in the countryside at the moment. A、has been built B、is built C、is being built
She _______ him not to smoke and he finally agreed. A、told B、asked C、persuaded
He _______ in the office the whole afternoon. A、has been working B、is working C、has worked
You look_______. What _______ you _______? A、tire, did,do B、tiring, have,done C、tired, have,been doing
A: This is Frank speaking. I would like to speak with Mr. Wang, please. B: I’m afraid you’ve dialed the wrong number. A、正确 B、错误
I started looking after these plants whose host went out to have a holiday. A、正确 B、错误
A: May I know who’s calling? B: Yes, you can. I.m Xiaoyan. A、正确 B、错误
The cinema is built last year. A、正确 B、错误
I have my house cleaned once a week. A、正确 B、错误
I don’t like to stay at home on Sundays. _______. A、So do I B、Neither do I C、So am I
_______Tom did to the guests is quite right. A、That B、What C、How
If he was healthy, he_______do more things useful. A、/ B、will C、would
I have given_______finishing this project. A、over B、down C、up
He is very good_______designing and drawing. A、at B、in C、on
Lily forgot_______a letter to her sister, so she wrote to her just now. A、to have written B、to write C、having wrote
Young people in China now_______to travel often. A、drive B、drives C、drove
I can finish the assignment_______myself. A、by B、on C、with
_______every week for several hours is good to keep healthy. A、Exercise B、To exercise C、Should exercise
_______these people know how to solve this problem. A、Most of B、Some C、Most
I _______ that singer closely as I was sitting in the front of the bar. A、saw B、watched C、observed
Not only I but also James and Lucy_______afraid of having too much pressure. A、is B、are C、be
_______I like most is_______I can have a party after work. A、That,that B、What, that C、What, what
I fell and broke my leg when I_______riding my bike. A、/ B、is C、was
She is the woman_______dog bit me. A、that B、which C、whose
A: Hello! This is Lee. I want to speak to Smith. B: This is Smith. A、正确 B、错误
A: Hello? 152-3951 B: Hello, is Anna there? A、正确 B、错误
A: Good morning, ABHK Bank. B: This is Brown speaking. I’d like to talk to Ms Lin. A、正确 B、错误
Mr. Doctor plays a most important part in the surgery. A、正确 B、错误
My family has lived in Lndon in 1995. A、正确 B、错误
向心推力轴承（ ）。 A、可同时承受径向载荷和轴向载荷 B、只能承受轴向载荷，不能承受径向载荷 C、只能承受径向载荷，不能承受轴向载荷 D、不确定
滚动轴承中必不可少的元件是（ ）。 A、内圈 B、保持架 C、外圈 D、滚动体
向心轴承是以承受（ ）载荷为主。 A、径向 B、轴向 C、径向和轴向 D、不确定
采用螺纹联接时，若被联接件总厚度较大，且材料较软，在需要经常装拆的情况下宜采用（ ）。 A、双头螺柱联接 B、螺栓联接 C、紧定螺钉联接 D、螺钉联接
不能用于传动的螺纹为（）螺纹。 A、梯形 B、锯齿形 C、三角形 D、矩形
推力轴承是以承受径向载荷为主。 A、正确 B、错误
通过连轴器联接的两轴可在工作中随时分离。 A、正确 B、错误
周转轮系的自由度一定为1。 A、正确 B、错误
联接是将两个或两个以上的零件联成一个整体的结构。 A、正确 B、错误
压入法一般只适用于配合尺寸和过盈量都较小的联接。 A、正确 B、错误
衡量铸铁材料强度的指标是强度极限。 A、正确 B、错误
塑性材料的失效主要为断裂失效。 A、正确 B、错误
一渐开线直齿圆柱标准齿轮，已知齿数z=25，齿距p=12.566mm，压力角a=20。，齿顶高系数ha*=1，顶隙系数c*=0.25。齿根圆直径（ ）。 A、90mm B、92mm C、96mm D、108mm
某传动装置中有一对渐开线。标准直齿圆柱齿轮（正常齿），大齿轮已损坏，已知小齿轮的齿数z1=24，齿顶圆直径da1=78mm，中心距a=135mm，齿顶高系数ha*=1，顶隙系数c*=0.25。大齿轮的模数（ ）。 A、1mm B、1.5mm C、2.5mm D、3mm
某传动装置中有一对渐开线。标准直齿圆柱齿轮（正常齿），大齿轮已损坏，已知小齿轮的齿数z1=24，齿顶圆直径da1=78mm，中心距a=135mm，齿顶高系数ha*=1，顶隙系数c*=0.25。大齿轮的分度圆直径（ ）。 A、195mm B、198mm C、200mm D、198m
一渐开线直齿圆柱标准齿轮，已知齿数z=25，齿距p=12.566mm，压力角a=20。，齿顶高系数ha*=1，顶隙系数c*=0.25。齿厚（ ）。 A、3.14 B、6.28 C、8 D、12.56
某传动装置中有一对渐开线。标准直齿圆柱齿轮（正常齿），大齿轮已损坏，已知小齿轮的齿数z1=24，齿顶圆直径da1=78mm，中心距a=135mm，齿顶高系数ha*=1，顶隙系数c*=0.25。这对齿轮的传动比（ ）。 A、2 B、2.5 C、2.75 D、3
某传动装置中有一对渐开线。标准直齿圆柱齿轮（正常齿），大齿轮已损坏，已知小齿轮的齿数z1=24，齿顶圆直径da1=78mm，中心距a=135mm，齿顶高系数ha*=1，顶隙系数c*=0.25。大齿轮的齿顶圆直径（ ）。 A、190.5mm B、204mm C、208mm D、214mm
渐开线标准直齿圆柱齿轮传动，由于安装不准确，产生了中心距误差，但其传动比的大小仍保持不变。 A、正确 B、错误
若齿轮连续传动，其重合度要小于1。 A、正确 B、错误
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