下列与气管、支气管异物相关影像，哪项不对（）
A.膈肌矛盾运动
B.肺门影增大
C.肺不张
D.肺气肿
E.纵隔摆动
参考答案：B
As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
A．primary
B．alternative
C．instant
D．unique
下列可以为用户提供Internet接入服务和各类信息服务的是
A．TCP
B．ISP
C．WWW
D．IP
