在确定智育内容时要遵循_____和_____的原则。
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lPv6地址可分为 地址、组播地址、任播地址与特殊地址。
《职工教育培训中心专职教师资格分级管理测评考核办法》中规定二级教师比例不高于20%。()
听力原文:(M) Would you like me to make an appointment for one of our staff to visit you? He'll be able to advise you on the best type of equipment and software packages to suit your particular business. He can also talk to you about installation and he'll take note of any restrictions in the office space and as part of our promotional campaign, the installation service is free of charge.
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