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【单选题】
下面哪个环境具有最大的不确定性?A.
大量的外部环境要素，而且要素不相似； 要素维持不变或缓慢变化。
B.
大量外部环境要素，而且要素不相似； 要素常常变化且不可预测。
C.
少量外部环境要素，且要素相似； 要素维持相同或缓慢变化。
D.
少量外部环境要素，而且要素相似； 要素常常变化且不可预测。
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举一反三
【判断题】The DBMS can maintain the integrity of the database by not allowing more than one user to update the same record at the same time.
A.
正确
B.
错误
【单选题】The government is _____ and will take the necessary steps to maintain security and stability.
A.
on the alert
B.
out of control
C.
on guard
D.
in vain
【单选题】Companies can maintain good business relations by abiding by their promises and agreements.
A.
coming up with
B.
breaking away from
C.
living up to
D.
getting rid of
【单选题】The DBMS can maintain the integrity of the database by allowing ______ to update the same record at the same time.
A.
more than one user
B.
no more than one user
C.
two customers with similar customer numbers
D.
company specialists
【单选题】According to Paragraph 2, that the world can maintain its linguistic diversity in the future is ______.
A.
uncertain
B.
unrealistic
C.
foreseeable
D.
definite
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