在镗床系统刚性允许的情况下,精铣时铣削用量选择,首先应考虑增加 () 。 A.背吃刀

题型:单项选择题

问题:

在镗床系统刚性允许的情况下,精铣时铣削用量选择,首先应考虑增加 () 。

A.背吃刀量(测吃刀量)

B.每齿进给量

C.铣削速度

考点:镗工考试中级镗工中级镗工题库
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How should one invest a sum of money in these days of inflation (通货膨胀) Left in a bank it will hardly keep its value, however high the interest rate is. Only a brave man, or a very rich one, dares to buy and sell on the Stock Market. Today it seems that one of the best ways to protect your savings, and even increase your wealth is to buy beautiful objects from the past. Here I am going to offer some advice on collecting antique clocks, which I personally consider are among the most interesting of antiques.
I sometimes wonder what a being from another planet might report back about our way of life. "The planet Earth is ruled by a mysterious creature that sits or stands in a room and makes a strange ticking sound. It has a face with twelve black marks and two hands. Men can do nothing without its permission, and it fastens its young round people’s wrists so that everywhere men go they are still under its control. This creature is the real master of Earth and men are its slaves. "
Whether or not we are slaves of time today depends on our culture and personality, but it is believed that many years ago kings kept special slaves to tell the time. Certain men were very clever at measuring the time of day according to the beating of their own hearts. They were made to stand in a fixed place and every hour or so would shout the time. So it seems that the first clocks were human beings.
However, men quickly found more convenient and reliable ways of telling .the time. They learned to use the shadows cast by the sun. They marked the hours on candles, used sand in hour-glasses, and invented water-clocks. Indeed, any serious student of antiques should spend as much time as possible visiting palaces, stately homes and museums to see some of the finest examples of clocks from the past.
Antique clocks could be very expensive, but one of the joys of collecting clocks is that it is still possible to find quite cheap ones for your own home. After all, if you are going to be ruled by the time, why not invest in air antique clock and perhaps make a future profit

The underlined phrase "stately homes" in Paragraph 4 means ______.

A.state-owned houses

B.houses in very good condition

C.grand houses open to the public

D.houses where statesmen meet regularly

题型:单项选择题

东风7C型机车柴油机的排气门阀座面角为()。

A、15°

B、30°

C、45°

D、60°

题型:单项选择题

纤维素细胞壁遇()显蓝色或紫色;菊糖遇()显紫红色。

题型:单项选择题

某天18岁的甲在大街看到一位手拿名牌包的妇女走过来,随后来到妇女跟前,想趁势夺走,但是妇女反应很快,紧紧拽着自己的包,甲两拳把妇女打倒在地,拿着包走了,但是没走几步发现该包是假冒的,于是又折回来把包扔给妇女。对于此案,下列说法正确的是()。

A.甲构成抢夺罪

B.甲构成抢劫罪既遂

C.甲构成抢劫罪中止

D.甲构成抢劫罪未遂

题型:单项选择题

常见的判别心理障碍标准有以下几种()

A、个人经验标准

B、社会适应标准

C、统计学标准

D、症状与病因学标准

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