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【简答题】
某实验基地水库中放养了一批罗非鱼。其监测数据显示,a~e段这种罗非鱼的种群数量发生了明显波动,调查发现有人在该水库中放生了大型肉食性鱼(FNE);一段时间后,罗非鱼种群数量达到了相对稳定状态(见图)。请回答问题: 若想估算该地区某种植物的种群密度,最常用的方法之一是()法,该方法的关键是要做到()。若想预测该地区未来一段时间内某物种的种群数量变化趋势,依据的种群特征是()
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【单选题】VQ35DE含义以下表述是错误的是()。
A.
V型发动机
B.
排量是3.5
C.
顶置双凸轮
D.
直列发动机
【单选题】Rowe & Kahn的三元素模型不包含下列何者?
A.
老化是一种连续适应的动态过程
B.
避免罹患神经性疾病与残疾
C.
维持正常的认知神经功能与身体活动能力
D.
持续活跃的社会互动与生产力
【判断题】There were fewer Lions in New York compared with other metropolises.
A.
正确
B.
错误
【判断题】There were fewer Lions in New York compared with other metroplises.
A.
正确
B.
错误
【简答题】There are some beautiful stone ____________ of lions and other animals in the fountain in the park.
【简答题】A.Powerful Lions B.Lions at Work and Play C.Lions, Social Cats D.Lions, Skilled Hunters
【单选题】Lions are predators. Other animals stay away from lions because they are dangerous.
A.
animals that live in a group
B.
animals that kill and eat other animals
【简答题】A.Lions make most kills in the daytime. B.Male lions care more about eating than hunting. C.It doesn't take lions too much time to make a kill. D.Lions are curious about things happening around them.
【简答题】A.Powerful Lions B.Lions at Work and Play C.Lions, Social Cats D.Lions, Skilled Hunters
【判断题】【§1.2】润滑不仅能减少为克服摩擦所需要的功率耗损,同时还能避免滚动和滑动表面的过渡磨损。
A.
正确
B.
错误
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