单项选择题

磁光检测技术是基于材料磁光效应原理，在外加电磁场的作用下呈现光学各向异性使通过材料的光波偏振性质发生变化，通过检测光的变化测量外加磁场。（） A. 对 B. 错

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不定项选择

Because of their bonding and their different atoms and unit cell structure, ceramics offer high resistance to shear and are good insulators.

A．正确
B．错误

单项选择题

Remaining questions are answered and loose ends are tied up in Act III.
A、正确
B、错误