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【单选题】
下列关于数据库的说法中不正确的是( )A.
数据库中的数据是按一定的数据模型组织和存储的
B.
数据库是长期存储在计算机中、有组织、可共享的数据集合
C.
数据库中的数据没有冗余
D.
数据库中的数据可同时被多个用户共享
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举一反三
【单选题】There are _______ days in a year.
A.
three hundred sixty-five
B.
three hundred and sixty-five
C.
three hundred and sixty –five
D.
two hundreds and sixty-five
【单选题】_______ people lost their lives in the traffic accident. [ ]
A.
Three hundred
B.
Three hundred of
C.
Three hundreds of
D.
Hundred of
【单选题】There are _________days in a year. A. three hundred sixty-five B. three hundreds sixty-five C. three hundred and sixty-five D. three hundred sixty five
A.
three hundred sixty-five
B.
three hundreds sixty-five
C.
three hundred and sixty-five
D.
three hundred sixty five
【单选题】提出细胞学说的是
A.
Robert Hooke和Leeuwen Hoek
B.
Crick和Watson
C.
Schleiden和Schwann
D.
Sichold和Virchow
E.
Avery和Flemming
【单选题】提出细胞学说的科学家是:
A.
Robert Hooke和Leeuwen Hoek
B.
Crick和Watson
C.
Schleiden 和Schwann
D.
Sichold和Virchow
【单选题】Three hundred multiples of three are picked at random, and three hundred multiples of four are picked at random. Approximately what percentage of the six hundred selected numbers are even?
A.
100%
B.
75%
C.
66%
D.
50%
E.
33%
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