【单选题】It is not how much we do but how much love we put into what we do _______ matters.
【单选题】How much those pens? [ ]
【单选题】'Those shirts are very expensive.''Do you know ______ ?'
【单选题】'Those shirts are very expensive, do you know ______?'
【简答题】电阻器的定义是什么?电阻器在电路中有哪些作用?