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家里有幼儿,如何消灭蟑螂?
（一）蟑螂的防治：1、人工捕杀：消灭成虫和幼虫，白天可清理橱柜及屉桌，见到就捕杀。夜晚可在8点钟以后每隔半小时在蟑螂多的地方如厨房、食物加工间、仓库等开灯捕杀一次，能收到...
银河系几个大小臂?
这是第二个原因T wel vec ons tel lat ion sex istintheuniverseandthesecondgalaxyisformedTw elv eco nst ell ati ons exi stintheuniver...
大学生英语竞赛c类词汇要求是多少个?
Other past presidents havecashed infinancially after leaving the White House. But no former president has been more determined to meld ...