Someone _____ the tap on, for the water was running over and flooding the bathroom. [ ]

A. must have left

B. ought to leave

C. should have left

D. need to leave

以下情况的血袋可以发出的是

A．标签完整、字迹清晰
B．有破损、漏血
C．血液中有明显凝块
D．血浆中有明显气泡、絮状物或粗大颗粒
E．血液中有明显凝块