不能采用直接显微镜检查的梅毒患者标本是()
A.下疳分泌物
B.皮疹渗出液
C.淋巴结穿刺液
D.病损组织
E.血清、血浆
参考答案:E
The captain ____ the crews before him, telling them to get ready for the sailing. [ ]
A. collected
B. selected
C. gathered
D. elected
某油罐基底附加压力P0=100kPa,基底下10m,Pz=28kPa,基底中心沉降200mm,基底下10m处土层沉降40mm,计算土层的压缩模量接近()。
A.4MPa
B.3.8MPa
C.4.2MPa
D.4.1MPa