题目内容

苏联教育家维果茨基提出了要探索儿童的_________,即判断儿童的现实水平和潜在水平。

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过度学习对于那些必须能长期地准确回忆而且又没什么意义的操练信息最为有用。()

A. 正确
B. 错误

在进行线路阻抗保护定值整定时,距离保护的第Ⅰ段、第Ⅱ段、第Ⅲ段的保护范围是多大?一般采用整定原则?

背斜的煤层凸起(),岩层自中心(),其中心部分为(),两侧依次对称出露()。

You are currently located in Singapore and have connected to a remote database in Chicago. You issue the following command:SQL> SELECT ROUND (SYSDATE-promo_begin_date, 0) FROM promotions WHERE (SYSDATE-promo_begin_date)/365 >2;PROMOTIONS is the public synonym for the public database link for the PROMOTIONS table. What is the outcome?()

A. an error because the ROUND function specified is invalid
B. an error because the WHERE condition specified is invalid
C. number of days since the promo started based on the current Chicago date and time
D. number of days since the promo started based on the current Singapore date and time&e

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