问题
填空题
《环境空气总烃的测定气相色谱法》(GB/T15263-1994)测定总烃时,除烃装置采用()做催化剂。
答案
参考答案:钯-6201
《环境空气总烃的测定气相色谱法》(GB/T15263-1994)测定总烃时,除烃装置采用()做催化剂。
参考答案:钯-6201
从方框内选择恰当的句子完成对话。 A: Hello! May I speak to Jim? B: I’m sorry. 1 I think he’ll be back in an hour. 2 A: That’s very kind of you. I’d like to invite him to watch a football match with me. 3 B: OK. 4 I’ll go and get a pen and a piece of paper. OK. Please give me your phone number. A: 5697846.My name is Su Lei. B: All right. 5
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