李洋同学在实验室用木炭和氧化铜两种黑色粉末在高温下反应制取单质铜，反应的化学方程

阅读短文并判断正(√)误(×)。

      A man is going to see his friend. He takes some sandwiches with him because his friend's home is very far.

On his way, he says to himself, " My friend is going to give me a very good lunch." Then he throws them away.

He goes on and comes to a river. There is no boat on the river. He can't cross it. He starts to go home. He is

hungry now. And he tries to find his sandwiches. " Oh, my God. A dog has them." He quickly goes up, but the

dog runs away. He is still hungry and he goes back home.

( ) 1. His friend's home is far.

( ) 2. He takes some cakes on his way.

( ) 3. He doesn't find a boat on the river.

( ) 4. The man can't find his sandwiches at last.

( ) 5. He is full and he goes back home.

实验是化学研究的基础，关于下列各装置图的叙述正确的是

A．装置①可完成多种气体的发生、净化和收集，如铜屑与稀硝 酸反应

B．装置②中，a为正极，d为阳极

C．装置③可用于收集H₂、NH₃、Cl₂、HCl、NO₂等

D．装置④能用于测量气体体积

引起调速范围不够的原因是（）。

A.调速系统速度变动率过大；

B.同步器限制点位置不对；

C.迟缓率过大；

D.调速器滑环上下限调整不当。

施工成本控制的依据不包括( )。

A．工程承包合同

B．施工成本计划

C．工程报告

D．工程变更

应城县重阳节是（）的日期，甚家皆于此日祭拜方社田祖之神。