题目

南昌大学研究人员发现，用2%的小苏打漱口能有效预防口腔粘膜糜烂溃疡的发生或修复原有口腔黏膜的损伤。小苏打属于（  ） A.盐   B.酸  C.碱 D.有机物 答案：A-What are you doing ? -I am _____my dictionary. I want to ____the answer.A. looking for, find B. finding, find outC. looking for, find out D. finding, looking for