皮皮学，免费搜题
登录
搜题
【简答题】
（1）家庭厨房中“柴米油盐酱醋糖”等都是化学物质．请问： （1）白糖与红糖，主要成分都是蔗糖．利用活性炭的______性，可将红糖脱色变成白糖． （2）食醋不慎滴在大理石台面上，会使其失去光泽，变得粗糙．这是因为______． （3）在农村柴草还是主要家庭燃料，烧柴草时有一句俗语是“人要实心，火要空心”，请解释这句俗语包含的化学知识______． （4）在化学后告诉妈妈，可以用将鸡蛋放入澄清石灰水的方法保存新鲜鸡蛋，请用化学方程式表示这种做法的原理______． （5）“釜底抽薪”（釜：指古代炊具，相当于现在的锅；薪：指柴火）包含的灭火原理是______．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Some educators that children should be rewarded for their great performance.
A.
assumed
B.
adopted
C.
advocated
D.
convinced
【简答题】What, then, is a good education at the end of the twentieth century? Some educators suggest that it should include foreign languages and the study of foreign cultures；a y of English, including t...
【单选题】Some educators are critical of the program because______.
A.
they don't think it fit for children in every respect
B.
it takes the children too much time to watch it
C.
it causes problems between children who have watched it and those who have not
D.
some parents attach too much importance to it
【单选题】Some educators try to put students of similar abilities into the same class because they believe this kind of ______ grouping is advisable.
A.
homogeneous
B.
instantaneous
C.
spontaneous
D.
anonymous
【单选题】Some educators begin to teach girls and boys separately because ______.
A.
some researches suggest that boys and girls do not study in the same way
B.
they are inspired by the success of Young Women's Leadership School
C.
researches in single-sex class prove that it works better for education
D.
problems in coeducation show that a single-sex school might be a better choice
【单选题】Some educators try to put students of similar abilities into the same class because they believe this kind of ______ grouping is advisable.
A.
homogenous
B.
instantaneous
C.
spontaneous
D.
anonymous
相关题目：
参考解析：
知识点：
题目纠错 0
发布
