____: An integrated circuit that contains the entire central processing unit of a computer ona single chip.

Anengineering change note would be placed: A: with the other notes in the drawing area B: ona sheet attached to the detail drawing C: inthe bill of materials D: in the revision block

以下哪种反应条件最适合合成异丁基仲丁基醚CH3CH2CH(CH3)-O-CH2CH(CH3)2 ? A: (CH3)2CHCH2OH + H2SO4 + heat B: CH3CH2CH(CH3)OH + H2SO4 + heat C: CH3CH2CH(CH3)ONa + (CH3)2CHCH2Br D: (CH3)2CHCH2ONa + CH3CH2CH(CH3)Br

以下哪种反应条件最适合合成异丁基仲丁基醚CH3CH2CH(CH3)-O-CH2CH(CH3)2 ? A: (CH3)2CHCH2OH + H2SO4 + heat B: CH3CH2CH(CH3)OH + H2SO4 + heat C: CH3CH2CH(CH3)ONa + (CH3)2CHCH2Br D: (CH3)2CHCH2ONa + CH3CH2CH(CH3)Br