纵隔恶性淋巴瘤有以下表现,错误的是()
A.上纵隔增宽呈波浪状
B.常多组淋巴结受累
C.常有包膜钙化
D.可侵犯心包
E.向肺内浸润呈线状、小结节状
参考答案:C
A strong earthquake struck Chile's central-south coast on February 22, ________ great damage to buildings
A.caused
B.to cause
C.causing
D.having caused
挖掘机的直动臂的特点是()。
A.构造简单
B.质量轻
C.得到较大的挖掘深度
D.布置紧凑