A、利用生态系统中现有的有机物质再生产有机物质,即为次级生产量 B、次级生产量的食源都是初级生产量 C、在所有生态系统中次级生产量都要比初级生产量少得多 D、次级生产量的制造者都是异养生物
A、利用生态系统中现有的有机物质再生产有机物质,即为次级生产量 B、次级生产量的食源都是初级生产量 C、在所有生态系统中次级生产量都要比初级生产量少得多 D、次级生产量的制造者都是异养生物
A、secondary surface radar B、secondary surveillance radio C、secondary surveillance radar D、surveillance secondary radar
A、Ⅰ:植被生物量;Ⅱ:初级净生产量;Ⅲ:次级生产量 B、Ⅰ:初级净生产量;Ⅱ:植被生物量;Ⅲ:初级净生产量与植被生物量之比 C、Ⅰ:次级净生产量;Ⅱ:初级净生产量;Ⅲ:三级净生产量 D、Ⅰ:生态系统呼吸;Ⅱ:初级净生产量;Ⅲ:三级生产者生物量
A、优先无保证债券,优先次级债券,次级债券,劣后次级债券,有保证债券 B、优先无保证债券,有保证债券,优先次级债券,次级债券,劣后次级债券 C、有保证债券,优先无保证债券,优先次级债券,次级债券,劣后次级债券 D、有保证债券,优先无保证债券,优先次级债券,劣后次级债券,次级债券
A、bring up the secondary site on the target disks B、suspend and bring up the secondary site on the target disks C、perform a FlashCopy and bring up the secondary site on the target disks D、"go-to-sync", perform aFlashCopy, and bring up the secondary site on the target disks
A、Connect the new DVD drive as the primary on the secondary bus and leave the old CD drive disconnected. B、Move the secondary hard drive next to the primary hard drive and connect to the primary bus. Connect the new DVD drive as the slave on the secondary bus. C、Move the secondary hard drive from the secondary to the primary bus and then reformat the hard drive after rebooting then reassign the drive letters in disk management prior to installing the new DVD drive on the secondary bus. D、Move the secondary hard drive to the bay and then connect it to the primary bus. Connect themini-tower and the new DVD drive as the master on the secondary bus.