A.A projector and a wireless microphone. B.A PowerPoint projector and an overhead projector. C.A projector and a microphone on the podium. D.A wireless microphone and a microphone on the podium.
【单选题】How Ice Cream Works The U.S. ice cream industry sells about a million gallons of ice cream each year, dispensing cones, gallons, pints, sundaes and other desserts through grocery stores and ice cream ...
【单选题】How Ice Cream Works The U.S. ice cream industry sells about a million gallons of ice cream each year, dispensing cones, gallons, pints, sundaes and other desserts through grocery stores and ice cream ...