题干

下图表示不同的生物或成分,说法错误的是(   )

A:若M代表基因多样性,a-d代表4种不同的植物,则在剧烈变化的环境中最容易被淘汰的可能是a

B:若M代表生物所含的能量,则森林生态系统的a-d四个种群中,a所处营养级有可能最高

C:若M代表物种丰富度,a-d代表4种不同的演替阶段,则从光裸的岩地演替到森林的顺序依次是a→c→d→

D:若M代表种群密度,则a-d 四种野生生物的种内斗争最激烈的一定是b种群

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D

同类题1

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.