下列不用于黑热病病原诊断的方法是（）
A.骨髓穿刺检查
B.淋巴结穿刺检查
C.动物接种法
D.肝、脾穿刺检查
E.乙状结肠镜下取活组织检查
参考答案：E
The buses, _____ were already full, were surrounded by anxious people.
A．all of them
B．all of which
C．they all
D．all which
放射性物品的装卸作业，应当在（）的现场指挥下进行。
A.押运人员
B.驾驶人员
C.装卸管理人员
