【多选题】写函要注意用语谦敬,以下语句往往用于函结尾处以表示尊重对方()
【简答题】Billy’s favorite color is orange. But he can’t see what orange looks like. Billy is blind. A month after he was born, his mother noticed that his eyes weren’t quite as big as a normal baby’s.”Billy wo...
【多选题】多选-以下涉及移液管的操作正确的是
A.
通过微微松动堵住移液管上端的食指,并慢慢转动移液管,使液面高度达到刻度线
B.
使用移液管前应该使用待转移溶液润洗,并将润洗后的溶液放回容量瓶
C.
液体流尽后,要再停留15秒左右,左右转动移液管
【多选题】写函要注意用语谦敬,以下语句往往用于函结尾处以表示尊重对方。
【简答题】阅读理解。 Mr. and Mrs. Clarke were going to America for their holidays. They had a dog called Billy. They liked him very much. But they couldn't take him to America with them. So they found a place to lea...
【简答题】写函要注意用语谦敬,以下语句往往用于函结尾处以表示尊重对方。_______ A、“不知贵方意见如何,请函告” B、“恳请贵方大力协助,不胜感激” C、“请予以接洽是荷” D、“请参照以上意见办理,不得有误”
【判断题】被滴定的酸碱的浓度愈大,体积愈小,滴定突跃范围愈大。