根据皮亚杰的儿童认知发展理论，处于具体运算阶段的儿童具有的特点有（） ["守恒性","抽象思维","思维可逆性","逻辑推理"]
The SQL Tuning Advisor configuration has default settings in your database instance. Which recommendation is automatically implemented after the SQL Tuning Advisor is run as part of the automatic maintenance task？（） [" statistics recommendations"," SQL Profile recommendations"," Index-related recommendations"," restructuring of SQL recommendatio"]
复励直流电机是指电机的励磁绕组和电枢绕组进行如何连接？（） ["串联","并联","单独分开连接","一部分串联其他的并联"]
怎样选择参照资产？
“以少胜多的白描，计白当黑的大写意”，具有这一塑造人物特点的作家是（） ["林斤澜","汪曾祺","冯骥才","陆文夫"]
决定磨损零件的修复或互换的依据是什么？
