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承包商在施工过程中应采取哪些质量控制的对策来保证工程质量
If you are travelling in a train, the things (Example: (0) ) seem to be (41) backwards. But this is not really true. It is the train that is moving. It is like the case (42) the earth and the sun. The sun seems (43) in the east, move across the sky, and set in the (44) . In other words, the sun seems to travel round the earth. However, (45) not really true. It is the earth that is turning on (46) own axis (轴) . The turning of the earth on its own axis is what makes the change (47) day to night. The earth also travels round the sun on an unchanging path (路径). As well as the earth, (48) other planets(行星) of (49) sizes. These are known as the solar system. The planet nearest the sun is Mercury, and the planet (50) from the sun is Pluto.
钢筋作业进度计划可采用横道图或网络图来表达。( )
力对物体的转动效应主要取决于力的三要素。( )
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