【简答题】In an experiment with fifth and sixth graders, the children were asked to solve some word puzzles that varied in difficulty.
【判断题】变压器 按铁心结构分心式变压器和 筒 式变压器。 ( )
【多选题】下列各项中,属于审计机关业务部门工作职责的有()。
【单选题】It is suggested in the last paragraph that ______ in the old world.
A.
children tended to compete for the favor of their parents
B.
children were determined to throw off their immigrant identities
C.
children were urged to achieve success in the fluid and classless society
D.
children worked hard for success along paths chosen by their parents
【多选题】企业法律顾问的工作任务之一是通过本部门的直接管理活动,促进企业依法经营管理。下列各项中属于本部门的直接管理活动的有( )。
【判断题】信令是一种机制,通过这种机制,构成通信网的用户终端以及各个业务节点可以互相交换各自的状态信息和提出对其它设备的接续要求。A. 错误B. 正确C. 介于两针之间D. 其余都不对
【单选题】下列关于关系数据库中主键的描述正确的是( )
【单选题】下列关于关系数据库中主键的描述正确的是( )。