实现了统一的货币:欧元,这表明欧盟 [ ]
A.只有一种货币——欧元
B.经济一体化程度在加深
C.已经变成了联邦制国家
D.成员国的经济水平一致
答案:B
32.Miss Bell joined the search-and-rescue team when she was 14, the youngest age ______ one can be admitted.
A.from which
B.at which
C.that
D.Which
会员制期货交易所的会员都是交易所的创办发起人。( )