Thegreatuseofschooleducationisnotsomuchtoteachyouthings_____toteachyoutheartoflearning.
一项对某软件公司员工的健康普查表明，80%的胃溃疡患者都有夜间工作的习惯。因此，夜间工作易造成的植物神经功能紊乱是诱发胃溃疡的主要原因。以下哪项为真，将严重削弱上述论证?
InfactPeterwouldratherhaveleftforSanFranciscothan____inNewYork.
设随机变量X，若D(X)=3，则D(一X+3)=()．
Whendoyouthink______startthenewattack?
