【单选题】Children and Parents Do parents owe their children something? Yes, they owe them a great deal. One of their chief obligations is to give their children a sense of personal worth, for self-esteem is th...
A.
tell the child that other children are doing much better than him/her
B.
remind the child that he/she is not bright
C.
tell the child he/she is just a grass that people won't notice
D.
help the child to build up self-confidence
【简答题】在53.2 g氯仿(HCl3)中,溶入0.804 g萘(C10H8),溶液的沸点比纯氯仿上升了0.455℃ ,请问氯仿的沸点升高常数是多少?
【单选题】现代污水处理技术,按原理可分为物理处理法、化学处理法和生物化学处理法三类,()不属于物理处理法。
【判断题】制作轻芝士蛋糕时,蛋糕未烘烤完全,太生,出炉就会快速塌陷;可以参考配方所给时间,接近时间时,用牙签试熟,烘烤完全后,再取出。
【简答题】把2.0g硫溶解在40.0g萘中,溶液的凝固点比纯萘低1.28℃,求硫的摩尔质量和分子式。
【简答题】A.have B.possess C.share D.owe