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各类用水按生活饮用水水质标准，用统一的给水管网供给用户的供水系统属于（）。
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实际价格包含了通货膨胀的因素在内。（）
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（）年，国务院首次确定把旅游业纳入“七五”国民经济和社会发展计划。
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俄罗斯中央选举委员会主席2008年3月7日宣布，根据统计结果，（）在总统选举中获胜。
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物业价格实质上是物业()的价格
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As Christmas is coming, there are presents to be bought, cards to be sent, and rooms to be cleaned. Parents are ___1___ with difficult jobs of hiding presents from curious young children. If the gifts are large, this is sometimes a real ___2___. On Christmas Eve, young children find the excitement almost unbearable. They are torn between the wish to go to bed early so that Father Christmas will bring their presents quickly and the wish to stay up late so that they will not miss the fun. The wish for gifts usually proves stronger. But though children go to bed early, they often lie awake for a long time, hoping to get a short ___3___ at Father Christmas. Last Christmas, my wife and I successfully hid a few large presents in the storeroom. I ___4___ the moment when my son, Jimmy, would ask me where that new bike had come from, but ___5___ he did not see it. On Christmas Eve, it took the children hours to go to sleep. It must have been nearly ___6___ when my wife and I went quietly into their room and began filling stockings. Then I pushed in the ___7___ I bought for Jimmy and left it beside the Christmas tree. We knew we would not get much sleep that night, for the children were ___8___ to get up early. At about five o’clock the next morning, we were woken by loud sounds coming from the children’s room — they were shouting excitedly! Before I had time to get out of bed, young Jimmy came riding into the room on his new bike, and his sister, Mary, followed close behind pushing her new baby carriage. Even the baby arrived. He moved ___9___ the hands and knees into the room dragging a large balloon behind him. Suddenly it burst. That woke us up ___10___. The day had really begun with a band! ___5___内应选（）
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随着碳含量增加，钢的屈服强度、抗张强度和疲劳强度均（）。
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可使用磁粉检测的有()。
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有机磷类杀虫剂的作用机制的（）
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社会保险与商业保险的联系与区别。