公安财务保障工作为各项公安工作( )
A.提供警用装备
B.提供经费
C.提供警用设施
D.提供服务
参考答案:B
解析:财务保障为各项工作提供经费,并有计划地、合理地使用经费.
用所给词的适当形式填空。
1. —You look ______ (worry). What's happened?
—Oh, I can't find my English book.
2. Two ______ (visit) have just arrived, they are ______ (America).
3. —How long ______ you ______ (study) English?
—For two years.
4. They (not hear) of that thing yet.
5. —When he (return) it?
—Half an hour ago.
6. ______ (thank) to your help, I can find my dog.
7. —______ he ______ (be) to Beijing before?
—Yes, he has.
8. I ______ never ______ (see) such a wonderful film before.
9. I happened _______ (meet) my old friend in the street yesterday.
穿过一个单匝闭合线圈的磁通量始终为每秒均匀增加2Wb,则 ( )
A.线圈中感应电动势每秒增加2V
B.线圈中感应电动势每秒减少2V
C.线圈中感应电动势始终为2V
D.线圈中感应电动势始终为一个确定值,但由于线圈有电阻,电动势小于2V