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问题 单项选择题

大量资料表明，下列哪项是肺癌的一个重要致病因素（）

A.长期接触放射性物质

B.长期接触石棉、铬等物质

C.长期吸入污染的空气和烟尘

D.长期大量吸烟

E.长期接触致癌物质

答案

参考答案：D

完形填空

Rudolph Valentino was a famous film star in the 1920s.

He once wanted to buy a particular silver ring that had a semi-precious stone in 31              .

The jeweler warned him against the ring, 32         (tell) him that it had a curse on it. 33           owned the ring would have bad luck.

Valentino did not believe him 34         he bought the ring.

He wore it during the making of his 35         film, The Young Rajah. The film was a complete failure.

Valentino put the ring 36   _   and went on to make many 37        (success) films. By 1926, he had forgotten all about the curse on the ring.

He wore it 38        .  Soon afterwards, he fell ill and died.

39         of Valentino’s friends inherited the ring.She, too, became ill, 40        quickly gave the ring away to a young artist. She recovered from her illness almost immediately,
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单项选择题

水利工程建设监理对工程建设的投资、工期和质量实行管理的工作方式为（）。

A.合同管理

B.质量管理

C.进度管理

D.全面管理
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