【单选题】As consumption increases, total utility increases
A.
at an increasing rate.
D.
and marginal utility increases.
【单选题】(p. 59) As the number of perceived service alternatives increases, the level of adequate service _____ and the zone of tolerance _____.
E.
Stays the same; stays the same
【判断题】The strength ofthe composite increases as the fiber-aspect ratio increases.