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【单选题】
Sometimes, even when the mind ___ functioning, the body keeps on working normally.
A. ceases
B. arouses
C. regulates
D. specializes
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Jeffery expressed his ___ about the health and fitness of his co-workers, but they said they didn’t want to “waste time” on an exercise bike or jogging.
A. agony
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Such chemicals are indeed negatively ___ those humans to whom they are expose D.
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There is every possibility that many species (物种) of animals will die out because of their disappearing food ___.
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As a college student, you should enjoy learning and get yourself ___ in those things that interest you.
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The name of Hitler (希特勒) has always been associated with war and ___ killing in the minds of those people who lived through World War Two.
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He works hard every day to make more money, but he ___ his health, time with his family, and the hobbies he once love D.
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I asked a passenger sitting beside me if our train was the Westlake Express train, and he said he ___ of it.
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We are sorry to know that they did not succeed ___ the project for lack of necessary funds.
A. to fulfill
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A. to … for
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A. let go of
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A. slip down
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焊条电弧焊有两种引弧方式:划擦法和___法。( 难 )
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焊条电弧焊是依靠人手工操作焊条运动实现焊接的,此种操作也称___。(中)
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常见的焊条电弧焊运条方法有___种。(易)
A. 5
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为不影响焊缝成形,保证接头处焊接质量,更换焊条的动作越快越好,并在接头弧坑前约 ___ mm处起弧,然后移到原来弧坑位置进行焊接。(中)
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【单选题】
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A. 整个
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【单选题】
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【单选题】
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A. 0.1~0.02
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工件焊后一般都会产生变形,如果变形量超过___值,就会影响使用。( 中 )
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焊接产生拉应力和压应力,当这些应力超过金属的___极限时,将产生焊接变形;当超过金属的强度极限时,则会出现裂缝。(难)
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焊瘤对静载强度无影响,但会引起应力集中,使___强度降低。(难)
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焊接质量的检验包括___试验三个方面。这三者是互相补充的,而以无损探伤为主。(中)
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CO2 气体保护焊设备可分为___焊和自动焊两种类型。(中)
A. 半自动
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