题目

John had failed to pay his phone bills for months, so his telephone was ______ last week. A. interrupted B. disconnected C. excluded D. discriminated 答案：B鸟的身体里有发达的气囊，与肺相通．鸟类进行气体交换的场所应该是（ ）A．肺和气囊B．气管C．气囊D．肺