被埋压时如何改善所处环境？
参考答案：
首先挪开头部周围的杂物，保持呼吸畅通，闻到煤气、毒气时，用湿毛巾等捂住口、鼻。
利用电子邮件进行交流的局限在于（）
A、电子邮件发送时间短，成本低
B、不利于师生在异地辅导作业，交流思想，互相协作
C、反馈速度受教师和学生积极性的影响
D、教师可以通过电子邮件方便与多个学生交流，并且交流时所需的工作量较小
The nurse is teaching the client how to use a cane. Which of the following statements is most inaccurate()
A. The client should hold the cane on the involved side.
B. The client should hold the cane close to his body.
C. The stride length and the timing of each step should be equal.
D. The nurse should stand behind the client to prevent falls.
