如果裂解炉烟道气呈淡兰色,可能的原因是什么?
参考答案:
原因可能是对流段烃进料管线泄漏,气化的原料进入烟道中所致
Some of us suggested that we ____ a rest, yet the others insisted that they ____ not tired at all. [ ]
A. shall take; would be
B. were going to take; be
C. take; were
D. would take; should be
甲氨蝶呤治疗类风湿关节炎的剂量和用法正确的是()
A.10mg,每周1天,分1次或2次服
B.50mg,每日,分1次或2次服
C.10mg,每日,分1次或2次服
D.50mg,每周1天,分1次或两次服
E.100mg,每日,每4周静脉注射1次