下列说法正确的是[ ] A．1L水中溶解了58.5gNaCl，该溶液的物质的量浓

While assessing a 2-month-old child’s airway, the nurse finds that the child isn’t breathing. After two unsuccessful attempts to establish an airway, the nurse should（）

A. attempt rescue breaths.

B. attempt to reposition the airway a third time.

C. administer five back blows.

D. attempt to ventilate with a handheld resuscitation bag.

_____ creatively，we must be able to look afresh at what we normally take for granted.

A．Thinking

B．To think

C．Having thought

D．Think

华法令抗凝观察指标是（）。

A.APTT在正常值的2～3倍间

B.APTT在2～3秒

C.INR在2.0～3.0

D.以上均不对

E.INR在正常值的2～3倍间

简述血液流变学。

企业环保信息异议处理程序包括（）。

A.异议申请、异议协查、信息修正、异议声明

B.异议申请、信息修正、异议声明

C.异议申请、异议协查、异议声明

D.异议申请、异议协查、信息修正