【判断题】纯铝因其强度低、可加工性差,可焊性差等特点,在汽车工业中使用较少。( ) 2.工业纯铝不能热处理强化,可通过冷变形提高强度,唯一的热处理形式是退火,塑性加工性能好。 ( ) 3.超硬铝合金是目前室温强度最高的一种育铝合金,其高温强度,冲压性也很好.( )
【单选题】On April 30, Holden Company had an Accounts Receivable balance of $18,000. During the month of May, total credits to Accounts Receivable were $52,000 from customer payments. The May 31 Accounts Receiv...