儿科预防在一段时间内发生的感染()
A.需要预防用抗菌药物
B.治疗性应用抗菌药物
C.不需要预防用抗菌药物
D.预防性应用抗菌药物无效
E.不宜常规预防性应用抗菌药物
参考答案:A
食保障车是在灭火救援现场制作、加工饮食的战勤保障车辆。
How does the effect known as “bank suction” act on a single-screw vessel proceeding along a narrow channel?()
A.It pulls the stern toward the bank
B.It heels the vessel toward the bank
C.It pushes the entire vessel away from the bank
D.It pulls the bow toward the bank