春秋战国至秦汉时期，各种思想流派纷呈。有学者将它们分别描述为：“全面归服自然的隐

If he _____ my advice, he wouldn't have lost his job. [ ]

A. followed

B. should follow

C. had followed

D. would follow

下列饮食习惯中，不易患坏血病的是（　　）

A．生吃新鲜水果

B．熟吃新鲜水果

C．高温烹调新鲜蔬菜

D．长期吃窖藏蔬菜

—Hi,Bruce.Here's a letter for you.

—Thanks.I wonder_________.[ ]

A. who that letter was from

B. who was from that letter

C. who was that letter from

D. who from that letter was

（）是建筑空间实在的限定要素。

A.墙面

B.地面

C.顶棚

D.梁与柱

用命令“INDEX ON姓名TAG index_name UNIQUE”建立索引，其索引类型是（ ）。

A． 主索引

B． 候选索引

C． 普通索引

D． 惟一索引