题目

— Mom, can you give me an extra 200 yuan a month? — Son, we have just bought a house, and from now on we need to practice strict ______. A. economy                  B. medicine                  C. self-control               D. patience 答案：A 小明想除去卫生间瓷砖上的铁锈痕迹，在用清水洗涤之前，他从家中选择了一种最合适的物质对铁锈进行处理，这种物质是 [　　] A．汽油 B．食盐水 C．白醋 D．米酒