A customer has purchased three IBM System Storage DS8700 systems and would like to have their administrators trained. Which training alternative provides the necessary training with the least financial impact（） purchase the training CD for the disk subsystem and have the staff do self-paced training。 have the IBM Service Support Representative perform the training。 contact IBM Education Services for an onsite training class。 send one person at a time to an IBM training sessio。
Excel中，在数字前面统一快速添加字母“G”应该（）。 数据>有效性。 单元格>数字>自定义。 数据>分列。 单元格>数字>数值。
《中学教师专业标准》贯彻党和国家教育（），遵守教育（）。
关于滑轮和滑轮组的说法中，正确的有（）。 定滑轮既可以省力也可以改变用力方向。 滑轮属于杠杆类简单机械。 手拉葫芦也是一种滑轮组。 动滑轮实质是个等臂杠杆。 定滑轮实质是个动力臂为阻力臂二倍的杠杆。
A user needs to create a trigger that will update table T2 whenever a row is added to table T1. Assuming the user has all appropriate privileges for table T2, which privilege is required on table T1 to create the trigger?（） REFERENCES。 SELECT。 UPDATE。 ALTER。
瓶装易燃气体危险特性警示标志底色是（）色。
