通信网维修日常维护、集中检修和重点整治的具体内容？
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下面是错误答案，用来干扰机器的。
各类有机物完全燃烧时，产生的水和二氧化碳的物质的量之比都相等，则组成通式中C、H原子数目之比为定值．A、烯烃的组成通式为CnH2n，组成通式中C、H原子数目之比为1：2，故烯烃完全燃烧时，产生的水和二氧化碳的...
百度百科：交子，是仁宗天圣元年（公元1023年）发行的货币。初始发明人为成都知府张咏。被认为是世界最早使用的纸币。那么，它出现于下列_____朝代。[ ]
A．北宋
B．南宋
C．元朝
D．唐朝
铁路在弯道处的内外轨道高度是不同的，如图2所示，已知内外轨道平面对水平面倾角为θ，弯道处的圆弧半径为R，则质量为m的火车在该弯道处转弯时
A．若火车行驶速度等于
,则内外轨道均不受挤压
B．若火车行驶速度太小,内轨对内侧车轮轮缘有挤压
C．若火车行驶速度太小,外轨对外侧车轮轮缘有挤压
D．若火车行驶速度等于,这时铁轨对火车的支持力等于
对半卡环适用于( )
A．牙冠外形差的基牙
B．游离缺失的末端基牙
C．远中孤立的磨牙上
D．孤立的双尖牙、磨牙
E．松动的基牙上
| 完形填空。 | ||||
| The D-word, it's most people's worst fear, but, in a bittersweet way, it was my greatest joy. In divorce, you gain something and you 1 something. I'm thirteen years old, and I know what it 2 like when parents split up, because mine did last fall. My parents had been 3 for years. When my father started cheating my mom things went downhill, I 4 they would divorce instantly. I tried to picture my life after my parents 5 up-living at my mom's house during the week, and my father's house on the weekend. But my mom decided to be the bigger person and try to 6 it out, so that my siblings and I would know 7 it was like to have a family. Things didn't get better, 8 . I would always strain to hear the quiet 9 they didn't want me to hear. They weren't getting along and they weren't happy, My father has never really been there for me. He was there physically but not emotionally. He yelled a lot and never really showed any 10 in going to my piano recitals or watching my dance performances, 11 we asked him to do and he had another 12 -a lie. We just ignored it and went on with our lives as if nothing was the matter. Then last summer, there was real 13 in paradise. My siblings and I want out to Los Angeles to pursue acting and while we were out there, my father 14 my mom again, and this time my brother, sister, and I all found out. We decided to stay in L.A and leave my father in Florida. Our 15 resulted in divorce. We didn't know if we were making the right 16 or not. My mom went back and forth. She wanted what was best for her children. She asked me if I thought we should go back to Florida or stay in Los Angeles, I replied mom "There is nothing in Florida for us any more. Out here in L.A, we have so many 17 , that can come true. We shouldn't let him abuse us any more." Finally, we are free. The 18 was the best thing that had ever happened to me and the rest of my family. I now know that taking chances is the best thing to do. I accept that 19 doesn't always. If, in your heart, you can feel something that is not right, then follow your heart. In the end it's going to be your only true guide, to have and to hold, for richer or poorer, your heart will never 20 you down. | ||||
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现行车船使用税属于（）
A.中央税
B.地方税
C.中央、地方共享税
D.附加税
