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【单选题】
下列哪一条不是一级标准物质（基准物质）所应具备的条件（）A.
与化学式相符的物质组成
B.
不应含有结晶水
C.
纯度应达99.9%
D.
在通常条件下应具有相当的稳定性
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举一反三
【单选题】I need to move to a larger apartment. Do you know of any ______ ones in this neighborhood?
A.
empty
B.
blank
C.
vacant
D.
bare
【单选题】An individual gets five units of utility from one slice of pizza and nine units of utility from two slices of pizza. The principle of diminishing marginal utility implies that the total utility from t...
A.
exactly 12 units of utility.
B.
less than 13 units of utility.
C.
less than nine units of utility.
D.
more than 14 units of utility.
【单选题】6) Marginal utility
A.
a) is the ratio of total utility to total consumption.
B.
b) is the rate at which total utility changes as the level of consumption rises.
C.
c) will always be equal to the product’s price.
D.
d) tells us nothing; we’re only concerned with total utility.
【单选题】—I need ______ money. Do you have ______, May? —Yes, a lot. [ ]
A.
some, some
B.
any, some
C.
any, any
D.
some, any
【简答题】效用(utility)
【单选题】Marketing channels exist to create utility for customers. The major categories of channel utility include all of the following except ( ).
A.
place utility
B.
price utility
C.
form utility
D.
information utility
【简答题】社区矫正的根本目的是什么？
【多选题】Economic utility includes ( )
A.
Possession utility
B.
Form utility
C.
Place utility
D.
Time utility
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