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 河南成教 / 河南理工大学
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25[单选题]
当焊丝随着焊机的自动移动而下降和融化时,颗粒状的焊剂不断从漏斗流下埋住炫目电弧,全部焊接过程自动进行时,称为【】


A.手工电弧焊

B.自动埋弧焊

C.半自动埋弧焊

D.电阻焊


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  • 下列关于透视的叙述,正确的是?医学影像学
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  • Goats are being hired to do the work of people near San Diego. The fires that occurred in Hillborbough four years ago destroyed thirty homes, most of which have been rebuilt. While people were rebuilding the homes, the grasses and bushes were growing back. The area is now so overgrown in bushes that there is again a major danger of fire.The city government put up bids to remove the bushes. The lowest bid they received was $50,000—and that was if the city provided breakfast and lunch for the workers for the six weeks it would take to clear the overgrown area. The city only wanted to give unlimited coffee and a piece of bread a day for each person. When that offer was rejected, the city asked for help on its website.A sheepherder in Montanta and a goat-keeper in San Bernardino read about the city’s plight(困境)while surfing the Web. They both offered to do the job for $25,000. The city government chose the goat-keeper because he lived closer. When he was told that the city dump(垃圾场)was overflowing , the goat-keeper said, “No problem. My goats will eat everything in your dump, except the car engines, of course.” So, for another $5,000, the city killed two birds with one stone. If all goes well, they will invite the goat-keeper and his “family” back every three years. The goat-keeper said that he would probably visit San Diego while his goats were in the dump. What are the “two birds” that the city government kills with only one stone? 大学英语(三)
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