一件令我感到温暖的事

Close the door,please.根据字母填写C______.2.P______me the pen,please.3.The cup is f____with tea. 什么是中性线?中性线的电流有何规定?在现实中如何使用? 求中性线电流 水泵和电泵的区别是什么 —Where is my hat?—Is ( ) one behind the door yours?A.a B.the C./ Where is my k_____ to this door Where is my 以K开头的 to this door 新制氨水中的微粒…有哪七种? 关于涡流,是不是即使在线圈中间不放导体,也会产生磁场的变化,也在消耗能源? he was hiding behind the door ___he could see what was happening答案怎么不可以是where或者from which非要是from where Someone may hide behind the door ,___he could hear what we talked about clealy.A.where B.from wher He hid himself behind the door from ------- he still could see what would happen to his classmate.空格中填一词,答案是where ,为什么填which不对呢? 10.He hid himself behind the door _______ he still could see what would happen to his classmate.A.there B.which C.from which D.from where 有没有朋友可以给烟花的化学方程式我..我要不同颜色的烟花化学方程式... 土.堂.古.兑.加上什么字可以组成新字(要加相同的字) 什么溶于水生成氢氧化钙顺便帮忙写出方程式 地震过后的报道中,会说失踪或下落不明的人数有多少,这些人为什么会找不到?如果活着去哪了,如果死了,尸体去哪了,尸体总不会平白无故消失吧! --Where she have put the key to the door?--- It maybe in the draw.A.can B.may C.must D.should the key to my door___.i have looked for it every where,but i still__itA is missing ;can't find B has lost ; don't findC has lost ; haven't foundD has been gone ; haven't found为什么选A Where's my cat?It's _____ the door. 比例阀是通过电磁铁实现的吗?为何要叫比例阀.什么比例换向阀,比例溢流阀,这个比例我很不懂,求指教 为什么用洗洁精洗红酒杯会变蓝色? 红酒怎么会变成蓝色的啊? 南极和北极哪个地方更寒冷? 苯和苯甲酸为什么不互溶? 苯甲酸溶于苯吗?溶解度是多少?还有就是 硝基苯与氢氧化钠反应吗?若可以条件是什么?(若有用催化剂请写出具体物质) 如何除去苯中溶有的少量苯甲酸?如何除去苯中溶有的少量甲酸? 不会游泳活人在水中会沉下去,死人为什么就会浮上来 人的心跳频率是多少?每个人都一样吗?同一个在不同的时间、地点一样吗? 四川天然气开发对四川盆地的影响请具体说明 人的尸体是沉入海底后再浮上来吗 为什么蜜蜂的尸体沉入水底,而大蚂蚁的尸体却浮在水上?