移动挂梯要选用质量较轻的材料，以免（）移动时阻力过大。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25759' and id < 2164552 and id<>'2164552' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25759' and id > 2164552 and id<>'2164552' order by id asc limit 5