Remaining in a bad relationship not only causes continual stress but may even be physically harmful.
A. 保持不良关系不但会引起持续的精神紧张，甚至还可能有害健康。
B. 僵硬的人际关系不仅引起持续的压力，而且引起身体的危险。
C. 留在一个坏的环境中，不仅会造成大的压力，而且会精神衰弱。
D. 保留坏行为，引起的是继续的压力，但不引起物理上的危害。
题录、索引、文摘等属于文献等级中的( )。
A. 零次文献
B. 一次文献
C. 二次文献
D. 三次文献
The orchestra(管弦乐队) ______ for about ten minutes when a man in the audience suddenly began shouting.
A. was playing
B. had been played
C. had been playing
D. was played
创办“诂经精舍”的是( )。
A. 王守仁
B. 黄宗羲
C. 阮
D. 朱熹
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