【判断题】在数据表中,某些列的值可能为空值(NULL),那么在SQL语句中可以通过”= null”来判断是否为空值。
【判断题】在数据表中,某些列的值可能为空值(NULL),那么在SQL语句中可以通过”= null”来判断是否为空值。
【多选题】材料消耗量定额中的材料消耗量由()组成。
【单选题】材料价格差异=(材料实际价格—材料标准价格)×()。
【单选题】How does the brain function according to the old view?
A.
The traces of memory are made in an area called hippocampus.
B.
The hippocampus stores long-term memory.
C.
The hippocampus is located behind the forehead.
D.
The information is stored in only the hippocampus, not in cerebral cortex.
【单选题】How does memory process?
A.
Encoding→Retrieval→Storage
B.
Storage→Retrieval→Encoding
C.
Encoding→Storage→Retrieval
D.
Storage→Encoding→Retrieval