事业单位办理备案登记时，需提供行政属地县(处)级单位以上主管部门的证明材料。( )
参考答案：对
Many of the audience ______ asleep when they ______ the lecture.[ ]
A. fell; were hearing
B. were falling; heard
C. had fallen; heard
D. fell; had heard
人类免疫缺陷病毒可导致
A．AIDSB．TSSC．SARSD．毒血症E．腹腔脓肿
