在实验室中进行了两类细菌竞争食物的实验。在两类细菌的混合培养液中测定了第Ⅰ类细菌后一代(即Z t+1 )所占总数的百分数与前一代(即Z t )所占百分数之间的关系。在下图中,实线表示观测到的Z t+1 和Z t 之间的关系,虚线表示Z t+1 =Z t 时的情况。从长远看,第Ⅰ类和第Ⅱ类细菌将会发生什么情况?()
【单选题】The managers of an organization develop a single, well-researched, and effective plan to complete a set of tasks. Which of the following qualities, according to Henry Fayol, does this plan have?
【单选题】Read the paragraph carefully, and decide which pattern does it follow? The same qualities that make people good house guests make them good hospital patients. Good house guests can expect a reasonabl...