晶体
参考答案:
内部质点在三维空间呈周期性平移重复排列形成的具有格子构造的固体。或具有格子状构造的固体。
She is wearing a dress _______ silk. [ ]
A. made from
B. made of
C. make from
D. make of
井下杂散电流能腐蚀()。
A.钢管
B.木支柱
C.橡胶套电缆皮