上市公司应将年度报告备置于（）。
A．证券交易所
B．公司所在地
C．有关证券经营机构营业网点
D．以上皆是
参考答案：A, B, C, D
The settlement is home to nearly l,000 people, many of ______ left their village homes for a better life
in the city. [ ]
A. whom
B. which
C. them
D. those
特发性直立性低血压的原因是：（）
A.颈静脉窦病变
B.低血容量性所致的直立性低血压
C.原因不明
D.药物所致的直立性低血压
