题干

下面四幅图都涉及到化学反应中能量的转化,下列叙述不正确的是(    )


A:图1中,将氢氧化钡晶体和氯化铵晶体混合反应:热能转化为化学能

B:图2中,烟花燃放:化学能转化为光能、热能等能量

C:图3中,天然气燃烧:化学能转化为热能

D:图4中,铜﹣锌原电池使电流表指针发生偏转:电能转化为化学能

上一题 下一题 0.0难度 选择题 更新时间:2020-01-15 08:15:22

答案(点此获取答案解析)

D

同类题4

阅读下列内容, 从每小题所给的 A、B、C、D 四个选项中选择一个最佳答案。

Who is the greatest teacher in Chinese history? Many people would think of Confucius(孔子), whose birthday was September 28. Although he lived over 2, 000 years ago, people still remember and respect him for his contribution(贡献) to the education today.

Confucius lived in the Kingdom of Lu, which lies in Shandong Province. He lived during the Spring and Autumn Period. He had a hard childhood. His father died when he was only 3. His mother brought him up. As a child, he had to work to help his mother, but young Confucius didn't give up studying. He visited many famous teachers and learned music, history, poetry and sports.

Later, he became a teacher and started the first public school in Chinese history. At that time only children from noble families could go to school, but Confucius believed everyone should go to school if they wanted to learn. He had about 3, 000 students in his lifetime.

Today, people still follow Confucius' lessons. He told us that we all have something worthy to be learned. “When I am with three people, one of them must be better than me in some areas. I choose their good qualities and follow them.”

He also taught us that thinking is very important in study. “All study but no thinking makes people puzzled (困惑的). All thinking but no study makes people lazy.” Confucius is not only a great teacher, but also a famous thinker with wise thoughts about the world and society. His most important teachings are about kindness and good manners. “A person should be strict with himself, but be kind to others.” he said.