单项选择题
A、检查冷却液、制动液、玻璃清洗液等有无到达上限B、通过发动机机油油尺，对PDI车辆的机油油位及机油质量进行检查，机油液位应达到油尺上限下约1mm;颜色澄清透明，无乳化等异常现象C、冷却液液位应达到上限，无缺失;颜色纯净，无乳化变色等异常现象;冷却液冰点检测正常，能满足环境要求D、对PDI车辆进行发动机舱清洁工作，清洁工作完成后恢复所有覆盖件，撤除车辆防护，结束发动机舱内的检查工作
A.CURSOR cursor_student OF select s_name,s_gender FROM student;B.CURSOR cursor_student FOR select s_name,s_gender FROM student;C.DECLARE cursor_student CURSOR FOR select s_name,s_gender FROM student;D.DECLARE cursor_student CURSOR OF select s_name,s_gender FROM student;
A.INB.INOUTC.OUTD.INPUT