施工企业需要变更时,可以先干活后办理洽商单。( )
参考答案:错
在我国,公安工作是由人民警察以( )名义按国家法律赋予的职权进行社会行政管理,执行国家意志,维护工人阶级和广大人民群众利益的活动。
A.国家
B.人民群众
C.中 * * 党
D.中国政府
— I haven't got the reference book yet, but I'll have a test on the subject next month.
— Don't worry. You ____ have it by Friday. [ ]
A. could
B. shall
C. must
D. may