Instructional objectives have three main functions, namely, guidance of instruction, learning and measurement of instructional result.
教学目标在教学中有三种主要功能，即导教、导学、导测量。
AIM To evaluate the instructional effect of spiral ct three-dimensional reconstruction and stereo-measurement on zygomatic complex fracture operation.
目的：评价螺旋CT三维重建及立体定量测量对颧骨复合体骨折手术患者的相关指导作用。
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