女性，65岁，突然胸痛、心悸2小时，心电图示V1–V5ST段弓背抬高，伴有频发室性收

－3的倒数是         ，|－5|＝         ．

A client on an inpatient psychiatric unit at a community mental health center is pacing the hallway and appears agitated. When the nurse approaches him, he says loudly, "Leave me alone. " What’s the nurse’s best approach

A. Say nothing and pace with the client.
B. Say "You sound upset. I’d like to help. "
C. Say "okay" and walk away.
D. Summon help in case the client becomes aggressiv

低铜银合金粉的铜含量（）

A.<3%

B.<6%

C.<13%

D.<20%

（）的办法是用来解决中国统一问题的政策。

A．和平共处 

B．“一国两制” 

C．西部大开发战略 

D．发展生产力

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