数控机床在轮廓拐角处产生“欠程”现象,应采用_____方法控制。A、提高进给速度;

题型:单项选择题

问题:

数控机床在轮廓拐角处产生“欠程”现象,应采用_____方法控制。

A、提高进给速度;

B、修改坐标点;

C、减速或暂停;

D、提高切削速度。

考点:数控机床操作工考试数控机床操作工考试题库
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把3×40=8×15改写成比例应写为______.(写出一个比例即可)

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情景一:李强在学校里是学生会干部,他每天努力搞好自己的学习,同时也为学会的工作尽心尽力。每当同学们在操场上锻炼、在阅览室里读书的时候,他却在学工处、教室之间穿梭着……在家里他还是个大孝子,妈妈生病了,他回家的第一件事就是看妈妈,给妈妈拿药,然后做功课。

情景二:王聪写得字非常漂亮。要办黑板报了,班长让他负责把内容写在黑板报上,他犹豫了,因为马上要进行期末考试了,可他还没有复习完。但是最终王聪接受了任务,并且很好地完成了,当然在完成这个任务的背后是他连续好几天的“挑灯夜读”。

(1)情景一中李强承担了哪些责任?

_______________________________________________________________________________

(2)情景二中王聪的做法说明了什么?

_______________________________________________________________________________

题型:单项选择题
Sea turtles have been on Earth for millions of years, but they may soon die out. The main   to them is people who kill them for food, according to Dr. Wallace J. Nichols of the University of California.
But the latest news may   2  turtle hunting: Dr. Nichols has found that sea turtles   3   a lot of pollution from the ocean. This pollution is unhealthy for both turtles and humans. It can cause __4__ damage to their bodies and lead to death. Research shows that many people get sick and even die from eating sea turtle meat. 
In the US, most people have never eaten turtle. This is because turtles are   5  by the United States law, which makes it   6  to harm or kill these amazing animals. “But many people in other countries still eat them,” explains Nichols. “Our first   7  was to save turtles; now we must save   8  too.”
Davis said he also wants to send out a bigger   9   that we should protect the oceans. “The health of the ocean, animals in the ocean, and our own health are all  10 . A clean ocean is really good for us too because of the food we eat from there.”
小题1:
A.doubtB.streamC.dangerD.worry
小题2:
A.accelerateB.slowC.improveD.change
小题3:
A.causeB.expandC.absorbD.reduce
小题4:
A.accidentalB.occasionalC.unknownD.serious
小题5:
A.qualifiedB.protectedC.restrictedD.produced
小题6:
A.impossibleB.difficultC.illegalD.abnormal
小题7:
A.goalB.impressionC.difficultyD.cost
小题8:
A.EarthB.oceanC.peopleD.animals
小题9:
A.advertisementB.messageC.signD.problem
小题10:
A.concernedB.disturbedC.developedD.connected
题型:单项选择题

所负数额较大的债务到期未清偿的个人可以担任股份有限公司的董事。( )

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简述秦汉魏晋南北朝时期君主丞相制的特征及其变化?

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