I like fruit as well as vegetables, because they are both good for my health.
A:and
B:or
C:but
弹力产生的条件是____、____.
①家住余杭的张兄坐船游大运河来到涿郡②寒门书生王某通过科举考试获得官职
③松赞干布与文成公主成婚④东京商业区内,人们用交子购买生活用品