A:12个
B:24个
C:36个
D:6个
It seems to me that Lucy and Lily ________ your classmates.
—________ will you ask for help when you get into trouble?
—My parents, I think.
明朝时期出现了总结性的科技著作,《农政全书》就是代表,该书记载:“吉贝(棉花)则泛舟而鬻诸南,布则泛舟而鬻北。”《天工开物·布衣》也说:“织造尚松江,浆染尚芜湖。”这反映出明朝