材料本身的性质(包括两种对摩的材料)
You work as a database administrator for Certkiller .com. As a result of performance analysis, you created an index on theprod_namecolumn of the Certkiller prodtable, which contains about ten thousand rows. Later, you updated a product name in the table. How does this change affect the index?() A leaf will be marked as invalid.。 An update in a leaf row takes place.。 The index will be updated automatically at commit.。 A leaf row in the index will be deleted and inserted.。 The index becomes invalid when you make any update。
运动单位
刑事诉讼的基本原则包括哪些?
下列是某医院室内环境污染物浓度的检测结果,其中()单项是符合规定要求的。 氡:350Bq/m3。 游离甲醛:0.0gmg/m3。 苯:0.08mg/m3。 氨:0.25mg/m3。 TVOC:0.4mg/m3。
公元前138年,汉武帝派张骞出使西域的目的是()。