下表是某科研人员对A，B，C，D四个生态系统中生物种类和数量的调查统计结果。根据表中数据分析判断，错误的是_刷题宝

题干

下表是某科研人员对A，B，C，D四个生态系统中生物种类和数量的调查统计结果。根据表中数据分析判断，错误的是（）

A：物种1和物种2很可能是生产者

B：A生态系统的自动调节能力较弱

C：C生态系统中的食物链、食物网最复杂

D：若B生态系统受到重金属铯的污染，体内铯含量最高的生物是物种2

上一题下一题 0.0难度选择题更新时间:2018-06-10 07:01:15

答案(点此获取答案解析）

D

同类题1

在方格纸中分别画一个三角形、一个梯形和一个平行四边形，使它们的面积都是12cm²。(每小格的面积表示1平方厘米)

同类题2

读某地区结构图右图，关于该农业区说法正确的是（）

同类题3

坐标平面内的点与____ 是一一对应的．

同类题4

2015年关于中小学生的近视调查报告称：小学生、初中生、高中生的近视率分别为22.78%、55.2%、70.34%．下列有关近视的说法不正确的是（）

同类题5

Here is some information(信息) about some people.

I am a math teacher. I teach math very well. Do you need help with your math？Call me at 679－ 8840.(Mr. Brown)

I lost my blue bag. It's from my mom and I like it very much. Did you find my bag？Please call me at 777－8953.(Lucy)

I like playing the violin，but I can't play it well. Can you help me？My phone number is 235－ 7765.(Joan)

Do you like reading？I have many old books and the books are free. Call me at 658－0034.(Mark)

Here is some information on today's newspaper.

FOUND

A blue bag. I found it in the library. My name is Sue. Please call me at 889－0764.

JOB

Are you good at math？Are you good with kids？We need a math teacher at our middle school. My name is Nick. My e－mail is nick@gmail.com.

MUSIC CLUB

Do you want to be a musician？Do you want to learn how to play the piano and the violin well？ Come to our club. Only 20 yuan for one lesson. Call Susan at 776－9898.

BOOKS NEEDED

We want to build a library for the kids in a small village. We need many books. Please call Mr. Han at 458－2217.

小学学科试题库

初中学科试题库

高中学科试题库