（电力）线路
参考答案：
用于电力系统两点之间输电的导线、绝缘材料和各种附件组成的设施。
补全对话，每空一词。
A：Who's your_1 friend?
B：My best friend is Xiao Li,but last week we had a big fight and now she doesn't talk to me.
A：How did it 2 ?
B：It all started when she asked me 3 she could copy my homework.
A：Why did she want to do that?
B：She said she had forgotten to do 4
A：What did you do then?
B：I told her that it was a 5 idea.
A：Did she think so?
B：No,she got really mad at me.
1.________ 2._________ 3.___________ 4._______ 5.__________
(8分)请根据下列装置，回答问题：
（1）写出标号①②的仪器名称：① ，② 。
（2）实验室制取CO2的反应方程式为 ；气体收集装置选 （填序号），检验收集的CO2气体是否已满的方法是
。F装置相对于B装置具有的优点是 。
（3）利用氯酸钾和二氧化锰的混合物制取O2后的固体残渣（假定已完全反应），通过以
下四步实验操作可回收二氧化锰。正确操作的先后顺序是 （填写选项序号）
a．烘干 b．溶解 c．过滤 d．洗涤
