皮皮学，免费搜题
登录
搜题
【单选题】
下列关于关系数据库中数据表的描述中正确的是A.
数据表相互之间存在联系，但用独立的文件名保存
B.
数据表相互之间存在联系，是用表明表示相互间的联系
C.
数据表相互之间不存在联系，完全独立
D.
数据表既相对独立，又相互联系
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】WHat is the challenge in understanding the changing relationship between human and the earth?
【单选题】The challenge is not one of expansion , the rapid growth in enrollment over the last 40 years has come to and end.
A.
As a result
B.
By all means
C.
In contrast
D.
On the contrary
【判断题】In our day, the challenge is to grasp every opportunity to eliminate nuclear menace.
A.
正确
B.
错误
【单选题】水调面由水、油、面粉调制而成，它( )。
A.
既有水调面的延伸性，又有油酥面的松酥性
B.
既没有水调面的延伸性，又没有酥面的松酥性
C.
具有水调面的筋性和延伸性
D.
具有油酥面的松酥性
【单选题】Evaluating employee performance is a key area of management skills. The challenge is to give the employees an accurate picture of their accomplishments, and of the areas in which they need to improve....
A.
are often those who have newly obtained the job
B.
often feel fearful and anxious
C.
often have the feeling of being looked down upon
D.
are often proud and confident
【单选题】Evaluating employee performance is a key area of management skills. The challenge is to give the employees an accurate picture of their accomplishments, and of the areas in which they need to improve....
A.
are often those who have newly obtained the job
B.
often feel fearful and anxious
C.
often have the feeling of being looked down upon
D.
are often proud and confident
【单选题】The challenge is in learning how to exploit its possibilities.
A.
treat unfairly
B.
gather together
C.
make use of
D.
compose of
【单选题】Evaluating employee performance is a key area of management skills. The challenge is to give the employees an accurate picture of their accomplishments, and of the areas in which they need to improve....
A.
are often those who have newly obtained the job
B.
often feel fearful and anxious
C.
often have the feeling of being looked down upon
D.
are often proud and confident
相关题目：