塑料、木头等传热能力弱的物体称为热的____。

水在化学实验中其重要作用．
（1）请根据以下实验回答问题：
①从微观角度分析，图甲中实验Ⅰ和实验Ⅱ的本质区别是____．由实验Ⅱ可以得出水是由____组成的．
②一段时间后观察实验乙：B中铁丝依然光亮，C中铁丝表面灰暗，D中铁丝依然光亮．B、C对比说明铁生锈主要与____有关；C、D对比说明铁生锈的快慢与____有关．
（2）如图丙1是a、b两物质在水中的溶解度曲线，请根据图回答：
①a的溶解度小于b的溶解度的温度范围是____．
②如图丙2所示，试管1、2中分别盛有20℃时等质量的a、b饱和溶液，底部有等质量的a、b固体剩余，向烧杯的水中加入冰块，下列判断正确的是____（不考虑溶剂的蒸发，析出的固体不含水）
A．试管2底部的固体减少
B．a溶液由饱和溶液变成不饱和溶液
C．a溶液中溶剂质量等于b溶液中溶剂质量
D．变化后b溶液中溶质质量分数大于a溶液中溶质质量分数．

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Henry comes from America．He likes1 a lot．He's visited many2．Last summer,he went to India，a county3a long history.During the trip there，he met something4from his culture(文化)．

    One day,he wanted to visit a palace．He went out of the hotel and5a taxi.When he told the driver and palace's name，the Indian6his head．Henry said

    again and the driver shook his head again．Henry,of course，got7．"Why did you always refuse (拒绝)me?"he shouted．"Please drive me to the palace'"The driver answered"Yes．sir!"and shook his8again．The taxi started and Henry didn't say a word．He9it，and then he said to himself,"I see, 'shaking the head' means'10 'here."