What best describes the normal blood flow to the lungs in a supine patient? （ ） A: largely uniform B: decreased flow to apices relative to bases C: increased flow to upper lobes

What are the main first aid measures?() A: Keep the airway open B: Supine or antishock position (Extended) C: Treatment of primary injury D: Sedative, analgesic and warm E: All of the above

which one is True about Transvaginal scan? A: If the mass is giant,we cannot use TVS B: we usually use supine position C: need not combine with Transabdominal scan D: Must keep the bladder full