采掘工作面风流中CO2浓度达到1.5%时，必须停止工作，撤出人员，查明原因，制定措施，进行处理。
参考答案：对
整流子和滑环表面应无变色、过热现象。其温度应不大于200度
A client with multiple sclerosis has been prescribed baclofen. The nurse teaches the client about the action of the drug. Which of the following is an accurate instruction regarding this drug’s action（）
A. "Baclofen will decrease your fatigue and help increase your energy levels. "
B. "Baclofen will help relieve the muscle spasms that you have been experiencing. "
C. "It is an antibiotic that will help treat your urinary tract infection. "
D. "Taking this drug will help decrease the visual problems you have been having. "
