请简述昆虫隔离的适用范围。
参考答案：昆虫隔离适用于以昆虫为媒介而传播的疾病，如乙型脑炎、流行性出血热、疟疾、斑疹伤寒等。
Speaker A: I can't seem to find a color TV of the new model. Speaker B:_____
A．Why don't you try the new store on King's Road
B．There's also something wrong with my TV set.
C．Don't you know the new model you want is not on the market yet
D．The new model is far more expensive than those old ones.
知识是主观的、不稳定的，是与其形成的情境脉络（）的。
A.紧密联系
B.内含
C.结构不良
D.重要性
