（）是保证人身安全和正确操作的重要措施。
参考答案：工作监护制度
------She didn’t come to school yesterday, did she? ‘
-----______．Though she was not feeling very well．
A．No, she didn’t
B．Yes, she was
C．No, she wasn’t
D．Yes, she did
中央银行在证券市场上公开买卖国债的业务属于( )。
A．国库业务
B．国际储备业务
C．公开市场业务
D．货币发行业务
