法规的清理具有以下特点（） ["清理的对象是已经颁布生效的规范性法律文件","清理的主体是原法律文件的制定者","法规清理不产生新的法律文件和规定，也不修改原有规范的内容，只审查原有法律文件是否合法合理","法规清理的结果具有法律意义"]
When a vessel is in dry-dock, the vessel’s engineers should （）. ["examine the condition of the propeller","chip and paint all hull protection zincs","install new docking plugs in all cofferdams","inspect the hull for hogging or sagging"]
什么是跨膜信号转换？
The implied condition(s) with respect to the doctrine of deviation in a marine insurance policy is(are)（）. ["that the cargo be discharged from the vessel with customary dispatch","that the voyage be commenced in a reasonable time","that the voyage be pursued over the usual and direct route","All of the above"]
怎样防止电视机起火爆炸？
怎样防止电热杯引起火灾？
