什么是弹塑性共存定律?
参考答案:
弹塑性共存指的是金属在发生塑性变形的过程中,一定会有弹性变形存在的规律,但这并不是说在金属发生弹性变形时,一定会有塑性变形存在。
动词填空(共8分,每小题1分)
小题1:More than 2,000,000 US dollars ________ (raise) every year by the charity to help children in Africa.
小题2:The master often says that he can make everyone who tries his best ______ (get) good grades.
小题3:The Green family ___________ (hold) a party at home when the earthquake began
小题4: Jim _________ (shake) the bottle twice before he took the medicine.
小题5:Mary _________ (fall) asleep until her parents came back last night, so she looks rather tired.
小题6:Alice learnt to ride last year, and since then she _____________ (ride) to school.
小题7:Could you tell me whether the paintings he devoted all his life to __________ (show) successfully in a month?
小题8: The radio said the temperature _________ (not rise) until the next week.
中国特色社会主义,是科学社会主理论逻辑和()逻辑的辩证统一。
A.中国科技发展历史
B.中国社会发展历史
C.中国经济发展历史
D.改革开放发展历史