隐性组织教学又称（），是培训师巧妙地运用表情、身姿等体态语言和各种教学技艺，不留痕迹地控制、转化学员课堂问题行为的组织方式。
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What is the mechanism that is used to allocate MAC addresses that are assigned to the VDC for the system MAC address？（）
A. NX-OS uses a random MAC address from the IEEE OUI block that is assigned to Cisco.
B. The VDC system MAC is pulled from the active supervisor and concatenated through a hash to ensure uniqueness.
C. NX-OS uses a value that is based on a range that is assigned to the SPROM of the system backplane.
D. The VDC system MAC is based on a range that is allocated to the first line card that is installed in the switch.
饱和盐水钻井液体系，其滤液中的NaCl含量一定要达到饱和，且具有一定的密度，防止岩盐层的塑性变形。
A. 正确
B. 错误
正电胶钻井液体系适用于未胶结或胶结性差的流砂层与砾石层、软的砂泥岩互层、易坍塌的泥岩层、含盐膏地层、煤系地层等复杂地层。
A. 正确
B. 错误
朱熹编著《小学集注》《论语训蒙口义》《童蒙须知》，对儿童的衣着、语言、行为、读书、写字、饮食等习惯提出具体行为规范。这反映出他对儒学发展的主要贡献是（）
A. 树立严谨认真的治学态度
B. 初步建立儒学的教育系统
C. 推动儒学的普及化与通俗化
D. 使儒学成为官方正统思想
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