题目

If you are looking for something fun and educational  to do in Maryland, why not visit the Maryland Science Center? It is located at 601 Light Street, Baltimore, MD21230. The ticket prices vary depending on ages, groups and the exhibits you choose.     Introduction     The Maryland Science Center is basically a museum, but it gives everyone a chance to learn through experience and play, rather than just glance at an exhibit.     Activities     You can learn about various topics, including outer space, the human body, dinosaurs, electricity, marine (海洋的) biology, ener下列国家中牛肉和羊毛在国际市场上占突出地位的是（ ）A.巴西 B.澳大利亚 C.阿根廷 D.美国