根据光合作用的原理，下列提高农作物产量的措施中，哪些与该原理有关？（ ）
A．适时播种、套种
B．施用有机肥料
C．合理密植、间作
D．适时松土
A、适时播种，表明种子的萌发需要一定的条件如温度．故不符合题意；
B、施用有机肥料，可以为植物的生长提供多种无机盐，促进植物的生长．故不符合题意；
C、合理密植、间作套种，有利于充分利用光能，提高光合效率．种植过密，植物叶片相互遮盖，只有上部叶片进行光合作用，种植过稀，部分光能得不到利用，光能利用率低．只有合理密植才能使植物充分的接受阳光，扩大光合作用的面积，提高光合作用的效率，增加产量．故符合题意；
D、适时松土，是为了增加土壤中的氧气，促进根的呼吸．故不符合题意．
故选C
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| A team of 5 Endon High School students-Dan, Charlie, Joe, Josh and Nathan joined BBC Radio Stoke's Online team to build the School Day website. Here's what Joe said about working on the"BBC Radio Stoke School Day" website. Today has been a great day for me! I have been working since a quarter past eight. This morning I got up really early. At half past six, I got dressed and ate my breakfast. I was so nervous that I messed up. When I got here I started taking pictures of Janine's show. Later the man from The Sentinel came to take our pictures (I have never had my pictures taken so much!). I made two web pages. Jonathan, Becky and Kristin were on the online team. They were great for help and organization (组织). I have put lots of pictures into the 'BBC Radio Stoke School Day' gallery which was very interesting. I have learnt how to take photos properly. The most enjoyable thing about today is seeing my work on the BBC Radio Stoke website. It is very interesting and enjoyable. | ||||||||||
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