SDH传输系统告警分为几种级别？
参考答案：
SDH传输系统告警分为紧急告警、主要告警、次要告警、提醒告警四个级别.
An 18-year-old primagravida tells the nurse that the physician told her that she needed to increase her intake of thiamine (vitamin Bi) in her diet. Which of the following foods should the nurse instruct the client to consume more
A．Milk.
B．Rice.
C．Asparagus.
D．Beef.
伤寒皮疹的特点有（）
A.多见于病程第7～13天
B.直径2～4mm
C.多在10个以上，分批出现
D.多分布于胸腹部
E.多在2～4天内消退
