In X-ray diffraction measurement, uniform strain causes peak（1）and non-uniform strain causes peak（2）。（please choose one of the three answers: shifting/broadening/unchanged）
使用X射线衍射法测量时，均匀应力使峰位（shifting/broadening/unchanged），不均匀应力使峰位（shifting/broadening/unchanged）。（每空从上述三个词中选一个填写）