问题
单项选择题
下列哪项不属于控制轧制提高强度的机理范围（）
A．加工硬化
B．沉淀析出
C．位错强化
D．细晶强化
答案
参考答案：A
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下列哪项不属于控制轧制提高强度的机理范围（）
A．加工硬化
B．沉淀析出
C．位错强化
D．细晶强化
参考答案：A
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study very hard. Others have trouble 2._____ on well with people like their parents and classmates. Jiu, a second-year junior student 3._____ Fujian, could not understand his teacher and was doing 4._____ in class. He became so worried about it 5._____ he started to cut his fingers (手指) with a knife. Another student, 14-year-old,from Guangzhou, was 6._____ of exams. She got very worried, and 7._____ she looked at the exam paper, she couldn't think of anything to write. Many students won't ask for help. Some think they will look stupid if they go to see a 8._____ . Others don't want to talk about their secrets. An expert on teenagers has the following 9._____ for teens: ▲ 10._____ to your parents or teachers often. ▲Take part in group activities and play sports. ▲Go to see a doctor if you feel unhappy or unwell. |