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【判断题】
一般情况下,merge语句包括了两个数据操纵命令,如果合并条件成立则执行(UPDATE )命令,如果合并条件不成立则执行(INSERT)命令。( )A.
正确
B.
错误
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举一反三
【单选题】Refer to the Figure. Which segmentation variable does the company rely on to identify its market?
A.
geographic
B.
socio-cultural
C.
socioeconomic
D.
demographic
【单选题】Refer to the Figure. This indifference map shows that: this consumer:【图片】
A.
prefers a car with more acceleration and less space.
B.
prefers more expensive rather than less expensive cars.
C.
is indifferent between acceleration and space at all levels of utility.
D.
all of the above
【单选题】【图片】Refer to the Figure. The effect of a decrease in the price of food, as depicted in the figure, leads us to believe that:
A.
food in an inferior good and clothing a normal good.
B.
food in a normal good and clothing an inferior good.
C.
both food and clothing are normal goods.
D.
both food and clothing are inferior goods.
【简答题】Would you please help me with this heavy box?英译汉
【单选题】Refer to the Figure. The connection of points B and D forms: 【图片】
A.
a demand curve.
B.
an income-consumption curve.
C.
a price-consumption curve.
D.
a shift from one demand curve.to another.
【单选题】Refer to the Figure. The connection of points A and B on the graph yields:【图片】
A.
a price-consumption curve.
B.
an income-consumption curve.
C.
an individual demand curve.
D.
an Engel curve.
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