对以暴力方法抗拒或者阻碍人民警察依法履行职责，尚未危及人民警察生命安全的，可以使用（）。
A、警械
B、武器
C、警械或武器
D、警械和武器
参考答案：A
The nurse is caring for a toddler with Down syndrome. To help the toddler cope with painful procedures, the nurse can（）
A. prepare the child by positive self-talk.
B. establish a time limit to get ready for the procedure.
C. hold and rock him and give him a security object.
D. count and sing with the child.
当通气储备百分比为多少时出现气急（）。
A.95%
B.90%
C.85%
D.75%
E.65%
