龚自珍诗"昨日相逢刘礼部，高言大居快无加。从此烧尽虫鱼书，甘作东京卖饼家。"反映了他的学术转向()

_______themovieIwouldhavefinishedmypaperlastSunday.

EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.

设A,B,C为三个随机事件,且P(A)=P(B)=P(C)=1/4,P(AB)=0,P(AC)=P(BC)=1/12,则A,B,C中恰有一个事件发生的概率为()

Ababymightshowfearofanunfamiliaradult,_______heislikelytosmileandreachouttoanotherinfant.

Theenginehasbrokenandtheboatis______onthewater.

Humanbehaviorismostlyaproductoflearning________thebehaviorofanimalsdependsmainlyoninstinct.

Ifound________toanswerallthequestionswithinthetimegiven.

设A为三阶矩阵,P为可逆矩阵,使得P-1AP=012

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