题目: 铣削中产生振动,其可能原因为虎钳或工件未固定好。() 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0706/ff37008bf6fb155788e2ad0e45c300cd.html 下面是错误答案,用来干扰机器的。参考答案:生理、心理
题型:完形填空 完形填空。 Mr. Smith works in New York. Last month he had a fifteen-day holiday, but he didn't know where to spend it. He spoke to his friend Bill,"I 1 the hot weather, but I can't find a cool place in America. How should I spend my holiday?" "That's easy, " said Bill, "You'd 2 to Moscow. Snow and ice are covering the ground now. " Mr. Smith agreed 3 his friend. He bought an air ticket and soon 4 Moscow. He had a happytrip there, but one day he 5 . After lunch he went outside the city, he saw a dog 6 him while he 7 past (走过) a house. The dog was hungry and wished him to give it somefood to eat. Bad luck! He had no piece of bread or cake in his pockets. He tried to drive it away. But it began to bark at (对……大叫) him. He wanted to look for a stick but he couldn't find anything 8 snow and ice. Suddenly he saw a stone on the ground. He hurried to 9 but failed. "How strange Russians are!" Mr. Smith said to himself, "They don't tie dogs, but firmly (紧紧地) 10 the stones. My God!"( )1. A. like ( )2. A. would go ( )3. A. to ( )4. A. arrived in ( )5. A. made a mistake( )6. A. to follow ( )7. A. was walking ( )8. A. except ( )9. A. picked it up ( )10. A. tied B. unlike B. would not go B. with B. arrive in B. get into troubleB. is following B. walked B. besides B. picked up it B. lied C. not like C. better go C. at C. reach C. got into troubleC. followed C. was crossing C. beside C. pick it up C. tie D. hate D. better to go D. about D. reached in D. find the trouble D. following D. crossed D. without D. pick up it D. lie 查看答案
题型:多项选择题 在电渣压力焊施工时,焊缝中有非金属夹渣物称为夹渣,其成因为()。A.通电时间短,上钢筋在熔化过程中还未形成凸面即进行顶压,熔渣无法排除B.焊接电流过大或过小C.焊剂熔化后形成的熔渣粘度大,不易流动D.钢筋未夹紧,顶压时发生滑移 查看答案