题目

If you _______ yourself to an unpleasant situation or fact, you accept it because you realize that you cannot change it. A. commit                        B. transfer                    C. apply                       D. resign 答案：D葡萄糖是细胞进行有氧呼吸最常利用的物质。将一只实验小鼠放入含有放射性18O2气体的容器内，18O2进入细胞后，最先出现的放射性化合物是 A．丙酮酸           B．乳酸             C．二氧化碳         D．水