计算小数除法时，商的小数点一定要与____的小数点对齐。
t℃时，往一定量氢氧化钙饱和溶液中，加入氧化钙，若充分搅拌后冷却到原来温度，则溶液中不变的是（ ）
He said he was very sorry because it was _______ his power to make the final decision. _______, I had to turn to others for help.
①从严治党，提高党的国家治理能力和行政水平
②依法执政，积极立法为依法治国提供法律保障
③依规治党，事关党的生命，提高党的执政能力
④执政为民，密切联系群众、维护人民的根本利益
