若某测量面对基准面的平行度误差为0.08mm,则其()误差必不大于0.08mm。 A

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问题:

若某测量面对基准面的平行度误差为0.08mm,则其()误差必不大于0.08mm。

A.平面度

B.对称度

C.垂直度

D.位置度

考点:机械工程机械制图机械制图题库
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The comprehension passages on this course are designed to help you increase your speed. A higher reading rate, with no loss of comprehension, will help you in other subjects as well as English, and the general principles apply to any language. Naturally, you will read every book at the same speed. You would expect to read a newspaper, for example, much more rapidly than a physics or economics textbook but you can raise your average reading speed over the whole range of materials you wish to cover so that the percentage gain will be the same whatever kind of reading you are concerned with.

The reading passages which follow are all of an average level of difficulty for your stage of instruction.

If you get to the point where you can read books of average difficulty at between 40 and 50 w.p.m. with 70% or more comprehension, you will be doing quite well, though of course any further improvement of speed with comprehension will be a good thing.

When you practice reading with passages shorter than book length, do not try to take in each word separately, one after the other. It is much more difficult to grasp the broad theme of the passage this way, and you will also get stuck on individual words which may not be absolutely essential to a general understanding of the passage. It is a good idea to skim through the passage very quickly first (say 500 words in a minute or so) to get the general idea of each paragraph. Titles, paragraph headings and emphasized words (underlined or in italics) can be a great help in getting this skeleton outline of the passage.

You would expect to read a physics textbook ().

A. at the same speed as you read a funny story

B. much more rapidly than a newspaper

C. as slowly as you read Austen’s novel Pride and Prejudice

D. much more slowly than a newspaper

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患儿男,25天。因反复呕吐20天入院,患儿入院查体:极度营养不良,精神差,皮肤弹性差,前囟凹陷,腹部平软,肠鸣音差。为确诊病因,必须要做的检查有()

A.上消化道造影

B.立位腹部平片

C.血液电解质分析+CO2CP

D.头部CT

E.腹部B超

题型:单项选择题

如图所示的是一个物体的运动图象,下列说法正确的是(  )

A.物体3s末开始改变速度方向

B.物体4s末开始改变位移方向

C.物体在第5s内的加速度的大小大于第1s内加速度的大小

D.物体在前5s内的位移方向改变

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据地下水化学成分的成因类型,可将地下水分为()。

题型:单项选择题

物流自动化的功能有()。

A.扩大物流作业能力

B.提高劳动生产率

C.减少物流作业的差错

D.降低监管力度

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