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Many movies receive ______ reviews from film experts and yet become extremely successful.

A. disparaging
B. authoritative
C. detailed
D. positive

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数据库的三级模式结构由外模式、模式和内模式组成，适合数据库类型有______。 Ⅰ．关系型数据库 Ⅱ．层次型数据库 Ⅲ．网状型数据库

A. 只有Ⅰ
B. Ⅰ和Ⅱ
C. Ⅱ和Ⅲ
D. 都适合

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The authors of the book suggest the use of deaf subject because ______.

A. deaf people are generally introversive
B. the auditory sense is an important factor in food evaluation
C. they are more fastidious in their choice of foods
D. all types of subjects should be used

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数据库数据的安全性是指______。

A. 保护数据库不受恶意访问
B. 避免意外地破坏一致性
C. 避免意外丢失
D. 都不是

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Anti-drug work has become a ______ of attention among the international community with the spread of drug abuse in the world.

A. spot
B. center
C. zoom
D. focus

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Many movies receive ______ reviews from film experts and yet become extremely successful.

A. disparaging B. authoritative C. detailed D. positive

数据库的三级模式结构由外模式、模式和内模式组成，适合数据库类型有______。 Ⅰ．关系型数据库 Ⅱ．层次型数据库 Ⅲ．网状型数据库

The authors of the book suggest the use of deaf subject because ______.

数据库数据的安全性是指______。

Anti-drug work has become a ______ of attention among the international community with the spread of drug abuse in the world.

A. disparaging
B. authoritative
C. detailed
D. positive