Thursday, September 22, 2022
问题:在光合作用时,C3植物的主要CO2固定酶有(),而C4植物固定CO2的酶有()。...
Wednesday, September 21, 2022
Thursday, September 22, 2022
问题:在土壤阳离子代换过程中,电价数高的离子代换力强,故一价阳离子不能代换出被胶体吸附的二价或三价的阳离子。...
Thursday, September 22, 2022
Thursday, September 15, 2022
Thursday, September 22, 2022
Wednesday, October 11, 2023
问题:脯氨酸在抗逆中有两个作用:一是作为()调节物质,用来保持原生质与环境的渗透平衡。二是保持膜结构的完整性。...
Friday, September 16, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022
问题:阳离子交换作用中交换的阳离子主要指()层的阳离子。...
Thursday, September 22, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022
问题:在可见光中除()外,其它均是绿色植物光合作用的生理辐射。...
Thursday, September 22, 2022
问题:邮电、铁路、公路、民航等部门在检疫方面有什么义务?...
Sunday, September 18, 2022
Thursday, September 22, 2022
问题:()是留2-20个主枝,其余侧枝全部摘除,形成较多的花。9、16头菊;2-4头大丽花等。...
Monday, September 19, 2022
Thursday, September 22, 2022
Friday, September 16, 2022
问题:光合作用是绿色植物利用太阳光能,把()和()合成有机物,并放出氧气的过程。...
Thursday, September 22, 2022