单项选择题

However, different programming languages have fundamentally different _______ , which are hard to combine.

A． implementations
B． systems
C． memories
D． interpreters
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You have installed two 64G flash devices to support the Database Smart Flash Cache feature on your database server that is running on Oracle Linux.You have set the DB_SMART_FLASH_FILE parameter:DB_FLASH_CACHE_FILE= ‘ dev flash_device_1 ‘,’ dev flash_device_2’How should the DB_FLASH_CACHE_SIZE be configured to use both devices?（）A.Set DB_FLASH_CACHE_SIZE=64GB.Set D3_FLASH_CACHE_SIZE=64G, 64GC.Set D3_FLASK_CACKE_SI2E=128GD.db_flash_cache_SI2E is automatically configured by the instance at startup
A.You
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某地为降低糖尿病的发病率而采取的措施中，属于第一级预防的是()
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B、在人群中开展合理营养指导
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