1、 A restaurant orders 150 kg of pumpkins from the farmer's market. The farmer fills the order with 23 pumpkins. The average mass of the first 20 pumpkins is 6.5 kg. What must be the minimum average m
死水微澜 英译本学习机会 The Calmness of Dead Water赞美西湖的古诗 The surface of the lake was smooth as glass, reflecting the surrounding trees and clouds. Not a single ripple disturbed the tra