搜题请搜索小程序“爱下问搜题”
问题 选择题

在绿色植物的叶肉细胞中，CO2的产生和固定的场所分别是

①叶绿体基质 ②类囊体薄膜 ③线粒体基质 ④线粒体内膜[ ]

A．①③　　

B．③④　

C．③①　　

D．②④

答案

答案：C

选择题

. We all think that _____ no need to make laws to prevent the young from getting married

during their college life.

A．it is

B．there has

C．it has

D．there is
查看答案
单项选择题

James Schneider & Co. have written to us that they are the leading importer in your place dealing ______ chemicals.

A．with

B．in

C．about

D．for
查看答案