中央银行在公开市场上主要是买卖()。
A.政府债券
B.股票
C.公司债券
D.商业票据
参考答案:A
I don't know ________. [ ]
A. where does he come from
B. what is his name.
C. how old he is
D. when will he leave
中古时期印度的种姓制度更加复杂,在四种姓之外,按照行业组成职业世袭、互相隔绝的各种()
A、瓦尔纳
B、摩诃
C、卡斯提
D、阇提