问题
单项选择题
经混凝处理的原水，细小悬浮物和杂质聚集成较大颗粒，依靠（）作用，从水中分离的过程为沉淀。
A.重力
B.吸附
C.架桥
答案
参考答案：A
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经混凝处理的原水，细小悬浮物和杂质聚集成较大颗粒，依靠（）作用，从水中分离的过程为沉淀。
A.重力
B.吸附
C.架桥
参考答案：A
请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该题涂黑。 There are a few memories from our childhood that will stay with us forever. A few that seemed so 36 at the time may cause us to smile years later. One such memory is a phone call I 37 when I was about three or four years old. My mother had entered a contest on a local 38 show. Entrants（参加者）were to tell an interesting story about their 39 . Winners would receive a phone call from Mrs. Santa Claus（女圣诞老人）! Mrs. Claus would award（奖励） the lucky child free 40 of a local store. Well, the call came. My mother talked to Mrs. Claus and then 41 the phone to me. I didn’t 42 the fact that many people were listening to our conversation. However, the fact that this lady had a 43 connection to Santa, that was important. I didn’t know it yet, but my mother had 44 the attention of the contest judges by telling about the time I had 45 a wall with crayons（蜡笔）. Even I knew that this was not the kind of 46 that Santa would approve. Suddenly, in a very pleasant tone（语气）of 47 , Mrs. Santa Claus asked me about my art work. I 48 that this lady was the real Mrs. Claus, not a radio station actress standing in for her. I 49 down the phone and ran crying from the room. My crime（罪行）had not 50 unpunished. Santa would 51 know that I’d been bad! It turned out that I did get a 52 present from the radio station and its sponsor（赞助商）. And I guess Santa didn’t find out about the wall. Maybe he did and was in a 53 mood. In any case, my Christmas presents did not 54 a piece of coal（煤）. I wonder what Santa has in 55 for this year. Hopefully my wife hasn’t written Mrs. Claus any letters.
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