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【单选题】
铝在人体中积累可使人慢性中毒,世界卫生组织将铝确定为食品污染源之一而加以控制.铝在下列使用场合中,必须加以控制的是(  )
A.
制造炊具
B.
制防锈油漆
C.
制铝箔
D.
制电线
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皮皮学刷刷变学霸
举一反三
【判断题】Risk aversion implies an increasing marginal utility.
A.
正确
B.
错误
【单选题】Which of the following best explains why increasing marginal costs of production arise?
A.
The factor endowments vary across countries.
B.
All the factor inputs are not fully utilized in the production of different commodities.
C.
Different consumers have different taste and preference sets.
D.
Different commodities use inputs in different proportions.
【单选题】脂蛋白电泳难于检出的是
A.
HDL-C
B.
LDL-C
C.
CM
D.
VLDL
E.
LP(a)
【单选题】In general, increasing marginal returns occur
A.
as output expands at low levels of production.
B.
through the entire range of production.
C.
as output expands at high levels of production.
D.
whenever the slope of the total product curve is positive.
【单选题】下面哪种因素对卤代物的S N 2反应不利?
A.
伯卤代烃
B.
高浓度卤代烃
C.
强亲核试剂
D.
强极性溶剂
【单选题】If, as the quantity produced increases, a production function first exhibits increasing marginal product and later diminishing marginal product, the corresponding marginal-cost curve will
A.
be flat (horizontal).
B.
slope upward.
C.
slope downward.
D.
be U-shaped.
【单选题】Increasing marginal returns occur when the _________.
A.
average product of a worker is less than the average product of the previous worker
B.
marginal product of a worker exceeds the marginal product of the previous worker
C.
average product of labor is at a maximum
D.
marginal product of labor exceeds the average product of labor.
E.
marginal product of labor is at a maximum
【判断题】Money has a increasing marginal utility.
A.
正确
B.
错误
【判断题】The "Law of Diminishing Marginal Returns" could also be termed the "Law of Increasing Marginal Costs."
A.
正确
B.
错误
【判断题】The "Law of Diminishing Marginal Returns" could also be termed the "Law of Increasing Marginal Costs."
A.
正确
B.
错误
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