Which of the following advisors within the Oracle advisory framework will analyze a single SQL statement and make recommendations for performance improvement?()
A. SQL Repair Advisor
B. SQL Optimizer
C. SQL Access Advisor
D. SQL Tuning Advisor SQL
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脑膜刺激征主要表现有()
A. 克尼格征(Kernig’ssign)阳性
B. 颈项强直
C. 锥体束征
D. 布鲁辛斯基征(Brudzinski’ssign)阳性
引起病毒性心肌炎较常见的病毒是_____________和_____________。
班轮航线货流方向不平衡系数等于两个方向总货流量与反向货流量的比值。()
A. 正确
B. 错误