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【单选题】
若取得"学生"数据表的所有记录及字段,其SQL语法应是______。A.
select 姓名 from 学生
B.
select * from 学生 where 12=12
C.
select * from 学生 where 学号=12
D.
以上皆非
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举一反三
【单选题】The maximum number of comparisons needed for the binary search of a 2000 element array is _______.
A.
9
B.
15
C.
11
D.
14
【单选题】Design a logic circuit to produce a HIGH output only if the input, represented by a 4-bit binary number（A(MSB) ,B ,C and D(LSB)）, is greater than eleven or less than five（not including eleven and five...
A.
Y=A'B'+AB+A'C'D'
B.
Y=A'B+AB'+A'C'D'
C.
Y=A'B'+AB+A'C'D
D.
Y=A'B'+AB+A'CD'
【单选题】How can an unsigned binary number be converted to a negative value of equal magnitude (e.g. from plus 4 to minus 4 or from plus 100 to minus 100) in Binary Two's Complement.11
A.
You can invert all of the bits.
B.
Invert all the bits in the original bit string, then add one.
C.
Replace the leading 0 with a leading 1.
D.
For an eight bit number, you would subtract 128 10 to get a binary number in the range -128 to plus +127.
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