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【单选题】
下列哪个聚合函数的参数要求必须是数值型( )。A.
min
B.
sum
C.
count
D.
max
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举一反三
【单选题】What is true about the writer?
A.
He succeeded in giving up smoking for ever.
B.
He began smoking again to please his wife.
C.
He gave up smoking for only a short time.
D.
He started smoking again for he didn't like sweets.
【单选题】Which of the following statements is true?
A.
The brain of an adult person shrinks 2.5% every 10 years.
B.
The cerebrospinal fluid of a person with 8 years of education may have increased 17.7 milliliters.
C.
The cerebrospinal fluid of a person with 16 years of education may increase by 10%.
D.
The brain of an aged person shrinks 5% every 10 years.
【简答题】Which is sillier: denying we ever went to the moon or trying to convince the true nonbelievers? Once upon a time – July 20, 1969, to be specific – two men got out of their little spaceship and wandere...
【简答题】Which is sillier: denying we ever went to the moon or trying to convince the true non-believers? Once upon a time—July 20, 1969, to be specific – two men got out of their little spaceship and wandered...
【单选题】Which of the following statements is true?
A.
The brain of an adult person shrinks 2.5% every l0 years.
B.
The cerebrospinal fluid of a person with g years of education may have increased by 17.7 millimeters.
C.
The cerebrospinal fluid of a person with 16 years of education may increase by 10%.
D.
The brain of an aged person shrinks 5% every 10 years.
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