回流和气化是精馏操作的稳定进行必不可少的两个条件。
参考答案:对
患者候诊时,突感腹痛难忍,出冷汗,四肢冰冷,护士应()。
A.让患者平卧候诊
B.立即给予镇痛药
C.安排患者提前就诊
D.催促医生加速诊查
E.进行心理安慰
根据首字母提示,补全单词。
1. He is s_____ with his life, but he never stops working for higher aim.
2. She will take the b_____ today. She takes out the money.
3. There are sixty s _____ in a minute.
4. She is h _____ . She always helps others in need.
5. Zhao Benshan is an excellent d _____ . He directed many interesting TV plays.