题目内容
为了把具有不同性质的数据和各种影响因素按类划片、理顺关系，可以采用排列图方法。( )
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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.
对接扣件用于两根钢管呈垂直交叉的连接。( )
低合金钢是专用电炉冶炼，脱氧完全的镇静钢。( )
不允许临时在脚手架上弯制粗钢筋。( )
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