似喘而不抬肩，呼吸虽急而无痰声，其为
A．短气B．少气C．上气D．喘症E．哮症
参考答案：A
They have reached a point _____ they are at a dead end. [ ]
A. where
B. which
C. that
D. when
全球生态学的研究对象是全球陆地和全球海洋。 ( )
