称取质量相等的氢氧化钠、氢氧化钾固体，分别置于两锥形瓶中配成溶液．在氢氧化钠溶液中滴入一定量盐酸恰好完全中和．将等量盐酸加入氢氧化钾溶液中，再滴入紫色石蕊试剂，指示剂呈（ ）
A．紫色
B．蓝色
C．红色
D．无色
NaOH+HCl═NaCl+H2O
40 36.5
KOH+HCl═KCl+H2O
56 36.5
观察化学方程式可以看出，消耗相同的盐酸需要氢氧化钾的量多，当使用相同量的氢氧化钠、氢氧化钾来与盐酸反应时，盐酸有剩余，故溶液呈酸性，酸性溶液能使石蕊试液变红；
故选C．
| 完形填空。 | ||||
| It was very cold outside my car. I did not want to get out of it 1 we passed by a cafe. Suddenly I noticed a short old man, covered with some bits of cloth, shaking with the cold. He was waiting for anyone who would 2 him a coin or a cup of hot coffee. I asked my 3 to go over and hand this old man something. He looked into my husband's face, smiled and said, " 4 ". I felt so happy and I wished the old man could live 5 the cold night. I was sure to meet him again and find out how he was the next 6 , as I have to pass this way every day, I did so the next evening, and he remembered the 7 and came up to my window and smiled at me. This time I offered him a 8 of food. He reached out for the bag and I gave him my hand. He 9 the food, smiled and said, "May God bless you." I looked at the old man and he 10 me think of my father. I do hope all of us will remember that maybe one day, it could happen to one of us, 11 please do not pass by a 12 person without offering at least a word of love and a kind smile or an act of kindness of any kind. | ||||
|