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参考答案：
冷变形金属在退火时发生组织性能变化的早期阶段，在此阶段内物理和力学性能的回复程度是随温度和时间变化的。
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参考答案：
冷变形金属在退火时发生组织性能变化的早期阶段，在此阶段内物理和力学性能的回复程度是随温度和时间变化的。
完形填空（共10题， 每小题1 分，计10分） My online friend is a kind and friendly girl. She is in America. Her 1 is Sophia. I meet Sophia 2 the Internet. She is twelve years old, and I am 3 years old, too. First, I 4 a letter to her and introduce my hobbies, my school and my everyday life. A few days later, I get Sophia’s 5 . She 6 me a lot about herself. I learn that she loves study, sports and movies. She likes China and Chinese food very much. She tells me something about America too. Sophia is good at English, French, and Spanish(西班牙语), so I ask her to __7 me with English. Sophia wants to learn some 8 , but it’s very hard for her. From Sophia, I know 9 about the world outside. I would like to 10 Sophia some day in America.
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