下图为生态系统碳循环示意图,①、②、③代表的生物成分依次是 A

下图为生态系统碳循环示意图,①、②、③代表的生物成分依次是

A.生产者、消费者、分解者

B.分解者、生产者、消费者

C.消费者、生产者、分解者

D.生产者、分解者、消费者

答案

D

相关题目

When you are reading fast,your eyes will be one or two word groups ahead of___
When you are reading fast,your eyes will be one or two word groups ahead of______ your mind is taking in. A.one                   B.the other                   C.th
如果A(a,b)与B(3,1)关于y轴对称,则a+b =           
如果A(a,b)与B(3,1)关于y轴对称,则a+b =           
函数在内有极小值,则( ) A.     B.    C.     D.
函数在内有极小值,则( ) A.     B.    C.     D.
回收硫磺主要来自石油和天然气,我国每年约从炼油中回收
回收硫磺主要来自石油和天然气,我国每年约从炼油中回收硫磺8万吨,从天然气加工中回收硫磺9万吨。若回收的硫全部用于制硫酸,则可生产硫酸的质
Don’t     to tell us if you have a problem.We’re friends,aren’t we
Don’t     to tell us if you have a problem.We’re friends,aren’t we?A.worry              B.apologize          C.promise                  D.h
 She missed the plane, _____ driving very fast to the airport.    A. unless 
 She missed the plane, _____ driving very fast to the airport.    A. unless      B. despite     C. though      D. without
Taking away a city’s rubbish is a big job. Every day trucks come into a city
Taking away a city’s rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can’t eat or use. If we kept these things we would soon have a mo
扩展下面语句,要求突出梅花不畏严寒的品格。 (3分) 梅
扩展下面语句,要求突出梅花不畏严寒的品格。 (3分) 梅花开放了。                                                     

最新题目