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When a piece of materialis subjected to a load, it will deform in the direction ofthe load only.

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Which statement ofelastic modulus is NOT correct？

A. Elastic modulus is also known as Young's modulus
B. The higher the magnitude ofelastic modulus the stiffer the material
C. Elastic modulus can be measured graphically in the elastic region ofthe stress-strain diagram
D. The higher the magnitude of elastic modulus the weaker the interatomic bonding forces

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In an interstitial solid solution, the solute atoms and the solvent atoms are of similar size.

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What are the two methods of measuring ductility？ Use formula to express the corresponding methods an

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患儿1岁，表情呆滞，眼距宽，舌常伸出t2外，鼻梁宽平，毛发稀少，面部黏液性水肿，皮肤粗糙，躯干长，四肢短

A. 21一三体综合征
B. 18-三体综合征
C. 先天性甲状腺功能减低症
D. 苯丙酮尿症
E. 粘多糖病

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