Reposition esophageal vein, percutaneous approach

Which of the following components of an effective public water supply distribution system involves water pumps?

A. Water supply source B. Distribution system C. Means of moving the water D. Processing or treatment facilities

Which of the following devices delivers low flow oxygen at concentrations between 24 and 44 percent?

A) The nasal cannula B) The Venturi mask C) The nonrebreather mask D) The simple face mask