无粘性土的松密程度取决于孔隙比的大小。()
参考答案:对
Spokesman has ____ that there is no Chinese crew on the ship hijacked by Somali pirates. [ ]
A. confirmed
B. proved
C. confused
D. refused
下列哪项是先兆子宫破裂与重型胎盘早剥所共有的临床表现
A.均有外伤史B.剧烈腹痛C.子宫呈板状硬,不放松D.伴有头盆不称E.都伴有多量 * * 出血