【单选题】依( )为标准,合同可分为双务合同与单务合同。
【单选题】It is important to appreciate the ethical issues involved in the development and use of information systems because ________.
A.
the data they contain is vast and personal
B.
the revenue of organizations is closely tied to their use
C.
they are not regulated by any governmental bodies
D.
they can be mass-produced by organizations with limited technical expertise
【单选题】--Beijing is really an old city and there're many places of interest. --So it is. Why not stay here for two days?
【单选题】We’re going to visit so many ______ places and do lots of _______ things .
【简答题】危险化学品零售业务的店面经营面积(不含库房)应不少于( ) m2,零售业务的店面应与繁华商业区或居住人口稠密区保持( )m以上距离。
【单选题】危险化学品零售业务的店面经营面积(不含库房)应不少于( )m2,零售业务的店面应与繁华商业区或居住人口稠密区保持( )m以上距离。
【判断题】常温下,浓硝酸可以用铝槽贮存,说明铝与浓硝酸不反应。 ( )A. 对 B. 错