控制空压机输入高压储气罐的电动气阀，在（）状态下动作。
A.空压机启动
B.空压机关闭
C.排水
D.对电缆充气
参考答案：A
Home delivery or online shopping, ________ to all, makes it available for us to buy various
goods conveniently. [ ]
A. known
B. knowing
C. to be known
D. having known
医疗机构对确定药品召回的药品的处置方式是（）
A.就地封存
B.就地销毁
C.暂停调配
D.退回批发企业
E.统一退回药库
