双相触电在电弧焊接中不易发生。因此不太危险。()

题型:判断题

问题:

双相触电在电弧焊接中不易发生。因此不太危险。()

考点:机械制造行业技能考试金属焊接与切割(综合练习)金属焊接与切割(综合练习)题库
题型:判断题

非密封性管螺纹(外螺纹),公称直径为1/2英寸,公差等级为B级,左旋,其正确的标记应为()

A.G1/2BLH

B.R1/2B左

C.RC1/2B

D.RP1/2B

题型:判断题

Chinese proverbs are rich and they are still widely used in Chinese people’ daily life.___ 小题1:_ these proverbs there are often interesting stories. For example, the proverb, “plucking up a crop ___小题2:___ (help) it grow”, is based on the following story.

It is said that a short-tempered man in the Song Dynasty(960-1279) was very anxious to help __小题3:___ rice crop grow up quickly. He was thinking about ___小题4:__ day and night. But the crop was growing much slower than he expected.

One day, he came up with an idea __小题5:___ he would pluck up all of his crop a few inches. He did so the next day.

He was very tired __小题6:__ doing this for a whole day, __小题7:__ he felt very happy since the crop did "grow" __小题8:__ (high).

His son heard about this and went to see the crop. Unfortunately the leaves of the crop began to wither.

This proverb is saying we have to let things go in their __小题9:__ (nature) course. Being too anxious to help an event develop often __小题10:__ (result) in the contrary to our intention.

题型:判断题

女30岁,头昏乏力2年,近3个月加重;检验结果:血红蛋白58g/L,骨髓亚铁氰化钾染色骨髓小粒含铁血黄素(+++)。

假如该患者骨髓亚铁氰化钾染色骨髓小粒含铁血黄素(+),幼红细胞内铁粒减少,骨髓象显示:中晚幼红细胞达45%,体积小,胞质蓝、量少,边缘不规则,最可能的是()

A.巨幼细胞性贫血

B.慢性溶血性贫血

C.珠蛋白合成障碍性贫血

D.缺铁性贫血

E.再生障碍性贫血

题型:判断题

在生活、生产中,目前用量最大,用途最广的合金是[ ]

A.钛合金

B.铜

C.钢

D.硬铝

题型:判断题

寄生虫检测中,不属于清洁级兔必须检测项目的是()。

A.体外寄生虫

B.弓形虫

C.爱美尔球虫

D.全部蠕虫

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