Directions: Study the following cartoon carefully and write an essay in which yo should 1)describe the cartoon briefly, 2)interpret the meaning revealed by it, and 3)give your point of view. You should write 160—200 words neatly.
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含碳量愈高的钢,其焊接性能愈好。( )
A. 对
B. 错
亚共析钢的奥氏体化温度一般在ACcm以上,才能获得单相奥氏体组织。( )
A. 对
B. 错
Directions: Study the following graph carefully and write an essay. Your essay should meet the requirements below: (1)describe the graph and interpret its meaning, (2)point out the problems and give your comments. You should write 160--200 words neatly.