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两个映射相等则定义、陪域、对应法则相同。()

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If someone wants to buy a travel card season ticket, what should he bring with him？

&8226;Look at the chart below．It shows the average share prices of each month of three companies during an eight-month period．
&8226;Which month does each sentence(11-15)below the chart describe？
&8226;For each sentence，mark one letter(A-H)on your Answer Sheet．
&8226;Do not use any letter more than once．
AMA's share price was about twice those of the other two companies in this month．

如果气割速度要快，可采用稍大些的火焰能率，但割嘴应离割件表面远些，并保持一定的倾斜角度，防止气割中断。()