服务中应做到()
A、举止文明礼貌,用语规范
B、接待客户要站立,客户离开要站立
C、物品接、送要双手
参考答案:A, B, C
用NA表示阿伏加德罗常数的值,下列叙述中错误的是
A.标准状况下,22.4L CH4与18g H2O所含有的电子数均为10NA
B.室温下,21.0g乙烯和丁烯的混合气体含有的碳原子数目为1.5NA
C.等物质的量的甲基(-CH3)与羟基(-OH) 所含电子数相等
D.1mol乙烷含有的共价键数目为8NA
The nurse is evaluating the effectiveness of airway suctioning. Which of the following outcome criteria is most appropriate()
A. Respirations unlabored.
B. Decreased mucus production.
C. Hollow sound on chest percussion.
D. Breath sounds clear on auscultation.