判断题植物的必需元素是指在植物体内含量很大的一类元素。
判断题被种在同一培养液中的不同植物,其灰分中各种元素的含量不一定完全相同。
填空题英译中(Translate):critical concentration()
填空题英译中(Translate):nitrate reductase()
填空题英译中(Translate):transport protein()
填空题英译中(Translate):nitrogenase()
填空题英译中(Translate):biological nitrogen fixation()
填空题英译中(Translate):transamination()
填空题英译中(Translate):induced enzyme()
填空题英译中(Translate):ectodesma()
填空题英译中(Translate):exchange adorption()
填空题英译中(Translate):balanced solution()
填空题英译中(Translate):ion antagonism()
填空题英译中(Translate):toxicity of single salt()
填空题英译中(Translate):physiologically neutral salt()