煤中碳、氢测定的试验仪器包括三部分:氧气()、()氧化产物()系统。
参考答案:净化系统; 燃烧管; 吸收
—Listen! Kathy is playing the piano in the next room.
—It _______ not be Kathy. She has gone to Hangzhou to visit the Cross-sea Bridge. [ ]
A. can
B. must
C. need
D. shall
简述写简历应注意的事项?