下列词语中体现了生态系统和生态平衡原理的是 [ ]
A．大雁南飞
B．狡兔三窟
C．老马识途
D．螳螂捕蝉，黄雀在后
答案：D
_________was reported in the paper, more than one hundred miners were saved.
A．It
B．That
C．As
D．What
宫颈裂伤缝合时，最后一针应距宫颈外侧端（）.
A.0.3cm
B.0.5cm
C.1cm
D.0.2cm
E.0.4cm
