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扬声器的变压器是120V可以直接220V吗 220v变120v怎么变120v的电锅用220v的电源,怎么把220v的电源变成120v的,锅的电阻在万用表电阻档200欧的测量下是14.3.在2千欧档测量是12/13! 220V电压现在120V是哪里错了 fusion restaurant怎么翻译 梦到吃红薯是什么意思 带有想的意思的成语有10个以上 带有“食”的成语.最好带有成语的意思. 120V触电能否用于220V电压 要把220V的电压降到120V要加多大的电阻 美国买的电热水壶120V电压60HZ 1500W,220v电压能用么美国买的电热水壶,买回来才知道电压120V　60HZ,用国内220V　50HZ电压,试着烧了几次,大约3次吧,都正常的,能到达沸点自动跳掉.但最后一次水温度 Please choose another topic ___you still have something else to say about this.选项：A.though B.unless C.if D.because我选的是B,但正确答案是A, 树顶餐厅 3TOP RESTAURANT BAR怎么样 齐纳击穿为什么是暂时的可以恢复 My mother (goes shopping) on sunday对括号里提问 How about this pair?的同义句是 I have worked in this city for about 30 years.同义句I have worked in this city ____ ____ ____ ____ ____.还有也改同义句：You must look after yourself well .You must _____ _____ ____ _____ yourself. A girl doesn't need a guy to be happy.是什麽意思啊? The little girl____to hand in her homework today A.doesn't need to B.doesn't need C.needn't D.need pn结电场问题看看这种情况：我看书上说,当空间电荷区形成以后,p区和n区的少数载流子会出现漂移运动,但是我理解不了比如n区吧,少子是空穴,但是在n区这边的空间电荷区是显正电的离子,那 spring配置事务里面这句话是什么意思? spring 事物配置有几种方式啊? spring配置sqlMapClient出错,错误如下：ERROR org.springframework.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanCreationException:Error creating bean with name 'sqlMapClient' defined in class pa He wants to know （ ）about public signs.A：anything B：noting C：something spring什么意思 spring的作用 我对这个人一无所知.I know nothing about this person可以 nothing know 为什么不行 请说明理由 苏伊士运河的地理位置, 蘑菇根带着泥巴有点长毛还能吃吗 长毛的蘑菇还能吃吗?拜托各位大神 干蘑菇长毛还能吃吗? Never believe anything because any other person has believed it.Use your own head其中的because为什么不能换成when? I would like to do sth.是否译为“我要做某事”?直译和意译分别是?