问题
单项选择题
工作温度≥450℃的锅炉受热面管子安装焊口在正式施焊前必须按电力部焊工考规考核合格，并必须由（）类焊工担任。
A.I
B.II
C.III
答案
参考答案：A
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工作温度≥450℃的锅炉受热面管子安装焊口在正式施焊前必须按电力部焊工考规考核合格，并必须由（）类焊工担任。
A.I
B.II
C.III
参考答案：A
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| The telephone rang. Mrs. Green went to 1 it. 2 was Vicky, her friend. Mrs. Green asked Vicky to come and have 3 with her and her family that evening. 4 a quarter to six, Mr. Green came back home with his children. He saw his wife 5 the window of the kitchen. She was 6 "What's 7 ?" he asked. "I've made a terrible mistake, Jim," She said "I've asked Vicky to come and have dinner with 8 this evening." "Well, that's 9 to worry about." Mr. Green said. "We should have a happy 10 together. We haven't seen her 11 a long time." "But I've just found that there isn't enough food in the house. I 12 you to get some meat on your way home three days ago and you forgot it." "Oh, my dear!" said Mr. Green. He stood still 13 his family. Suddenly he walked out of the house and ran 14 his car. He found some 15 in the car. It had been there for three days. | ||||
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