题目

同温同压下两个容积相等的贮气瓶，一个装有C2H4，另一个装有C2H2和C2H6的混合气体，两瓶内的气体一定具有相同的       （    ） A．质量        B．原子总数                C．碳原子数               D．密度 答案：C短文填空（根据短文内容，从方框中选择适当的单词并用其正确形式填空，使短文内容完整。并将答案写在答题卡的相应位置上。每个词只能用一次，有两个多余词）we interest if take with latercry worry tired happen so onceThe Great Wall is known as the eighth wonder of the world. Every year thousands of tourists from all over the world come to visit this place of 1._______in China. Last Saturday I went to the Great Wall 2.___some of my friends. It was a sunny day. On our way up, we saw many volunteers(志愿者) keeping order in the sun. They helped the elders with their bags, 3.____photos for some tourists and answered people’s questions. Though they were very4.______, they didn’t stop to have a rest. We were deeply moved when we saw this. Just at that moment, we saw a little boy standing alone and 5.___.We went over and asked what 6._____to him. From his answer we knew that he couldn’t find his mother. We told him not 7.____about it and then we tried to get in touch with his mother with the phone number he gave us. Twenty minutes 8.___, his mother turned up. When she saw her son, she was very excited and thanked 9.______with tears in her eyes. That day we not only enjoyed the beauty of the Great Wall, but also felt the warmth of the society. 10._____everyone can reach out a helping hand to others, the world around us will be more and more harmonious(和谐的).