强度较高的灰口铸铁、球墨铸铁、可锻铸铁的焊接用（）。 A: Z508 B: Z607 C: Z116 D: Z106

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2022-06-06 问题

强度较高的灰口铸铁、球墨铸铁、可锻铸铁的焊接用（）。 A: Z508 B: Z607 C: Z116 D: Z106

2022-06-06 问题

607 Our oil pressure reading is higher than normal. Request hold position. [音频]

2022-06-28 问题

机床导轨面和气缸加工面等重要灰口铸铁的焊接，焊接后可加工用（）。 A: Z116 B: Z607 C: Z3O8 D: Z106

2022-06-09 问题

Yan'an was called Yanzhou in ancient times, and the name Yan'an began from Yan'an County which was established in the third year of the Sui Dynasty (in 607 AD), and it has been more than 1400 years.( ).

Yan'an was called Yanzhou in ancient times, and the name Yan'an began from Yan'an County which was established in the third year of the Sui Dynasty (in 607 AD), and it has been more than 1400 years.( ).

2022-06-17 问题

若检验的假设为H0∶μ=μ0,H1∶μ≠μ0,则拒绝域为 ( )。 A: z >; zα B: z <; zα C: z >; zα/2或z <; -zα/2 D: z >; zα或z <; -zα

2022-06-01 问题

若检验的假设为H0：u≤u0，H1：u>u0，则拒绝域为（）。 A: z>z B: z<- z C: z>zα/2或z<-zα/2 D: z>z或z<-z。

2022-05-30 问题

学术界一般认为科举制度创立的年代是（） A: A开皇三年（583） B: B开皇十八年（598） C: C大业三年（607） D: D大业五年（609）

2022-06-09 问题

Yan'an was called Yanzhou in ancient times, and the name "Yan'an" began from Yan'an County which was established in the third year of the Sui Dynasty (in 607 AD), and it has been more than 1400 years.（）。

Yan'an was called Yanzhou in ancient times, and the name "Yan'an" began from Yan'an County which was established in the third year of the Sui Dynasty (in 607 AD), and it has been more than 1400 years.（）。

2022-06-07 问题

607、粮豆的化学污染物指标:( )。 A: 通常指安全性化学指标 B: 包括农药残留、重金属(含砷)、毒素(植物毒素、霉菌毒素) C: 蛋白 D: 淀粉

2022-07-25 问题

用2.00A的电流，电解硫酸铜的酸性溶液，计算沉积400mg铜，需要多少秒？（铜相对原子质量63.546）( ) A: 22.4 B: 59.0 C: 607 D: 304

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