不定项选择

金属材料的不同强化方式其微观机制均与位错的运动受阻有关。

A．正确
B．错误

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B、多发性骨髓瘤
C、慢性炎症
D、免疫功能抑制

单项选择题

According to the story Yi Dai the Bird Avoids Dangers, the famous quote “If I have seen a little further it is by standing on the shoulders of Giants” shows _________________.

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B．Newton is a famous physicist
C．Newton is a modest person
D．The importance of knowledge