被誉为是世界上首部农学“百科全书”的是（    ）

B

    I'm at Billy's birthday party. There are a lot of friends in his house. Some stand beside the table and enjoy the snacks and drinks. There is some food on the table. I like the chocolate and the fruit very much. Billy sits in the sofa and chats with some friends there. He wears a red T-shirt and a pair of blue jeans. He looks so cool today. Wow! The cake is really big. There are some candles on it. Billy's friends begin to sing 'Happy Birthday' to Billy. Billy is very excited. He blows out the candles (吹蜡烛) and cuts the cake. Everyone has fun at the party.

1651年，克伦威尔颁布《航海条例》规定：“……无论为英国人或别国殖民地，所生长、出产或制造的任何货物和商品，如非由属于本共和国人民所有的任何种类船舶载运，皆不准输入或带进英吉利共和国……殖民地或领土。”这一“条例“（ ）