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教材问答丨教科版小学科学五下2.4《增加船的载重量》教材问题解答

  • 2026-03-31 11:00:34
教材问答丨教科版小学科学五下2.4《增加船的载重量》教材问题解答

教科版科学六下教材问答

——小学科学网——

十一.P30：1.船的载重量跟什么有关?

答：船的载重量与船只体积大小、结构、重物放置位置等多种周素有关。

2.怎样提高船的载重量?

答：相同重量和相同大小的材料，制作的船型体积越大，船的载重量也越大。

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教材问答丨教科版小学科学五下2.5《给船装上动力》教材问题解答

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  1. CONNECT:[ UseTime:0.000514s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000737s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000303s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000259s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000482s ]
  6. SELECT * FROM `set` [ RunTime:0.000194s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000507s ]
  8. SELECT * FROM `article` WHERE `id` = 461175 LIMIT 1 [ RunTime:0.000381s ]
  9. UPDATE `article` SET `lasttime` = 1775410321 WHERE `id` = 461175 [ RunTime:0.002470s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000228s ]
  11. SELECT * FROM `article` WHERE `id` < 461175 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000408s ]
  12. SELECT * FROM `article` WHERE `id` > 461175 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000565s ]
  13. SELECT * FROM `article` WHERE `id` < 461175 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000595s ]
  14. SELECT * FROM `article` WHERE `id` < 461175 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000607s ]
  15. SELECT * FROM `article` WHERE `id` < 461175 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000657s ]
0.075169s