植物矿质营养 mineral nutrition of plant
参考答案:
植物为维持生长和代谢的需要而吸收利用无机营养元素的过程。
A 56Kbps Modem is a device that translates the ()signals from your computer into analog signals that can travel over a standard phone line,and it can sends data at 56,000 bits per second.
A.mouse
B.voice
C.analog
D.digital
安全生产管理指标应细化和分解到()。
A、各部门和船舶
B、各岗位
C、各部门、船舶和岗位