焦化气体中的C3、C4含量比催化裂化气体低。
焦化气体中的C3、C4含量比催化裂化气体低。
相关考题:
下列过程定义语句中,参数不是对象的定义语句是( )。A.Sub Pro4(x As Form)B.Sub Pro4(y As Control)C.Sub Pro4(Form1 As Form,Labell As Control)D.Sub Pro4(x As Currency)
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