【C10】A．ruinedB．distinctC．fragileD．extinct

在进行SQL查询时，为了使得返回的结果集中记录互不相同，需要使用关键字（)。A． INB．DISTINCTC．TOPD

According to Paragraph 3, why are there cracks in rocks？A．Because the rocks are fragile un

【C12】A．similarB．distinctC．urgentD．separate

【C17】A．ruinedB．damagedC．wreckedD．violated

He was awarded a certificate of _____ for his pianoplaying.A) gloryB) distinctC) prais

The sad truth is that ecosystems are______fragile and intensely complicated.A．inherentlyB．