题目

We suddenly saw the bus about to leave and had to run _____ to catch it. A. hardly    B. awkwardly    C. hard    D. strongly   答案：C下列反应中，属于非氧化还原反应的是A．2FeCl3＋Cu＝2FeCl2＋CuCl2B．Cl2+H2O==HCl+HClOC．4Fe(OH)2+O2+2H2O= 4Fe(OH)3D．CaCO3＋2HCl＝CaCl2＋H2O＋CO2↑