36套第二套问题

steveguangUID: 3406601

The kind of intelligence favored by the interplay of increasingly smarter catchers and increasingly keener escapers is defined by attention—that aspect of mind carrying consciousness forward from one moment to the next. It ranges from a passive, free-floating awareness to
15 a highly focused, active fixation. The range through these states is mediated by the arousal system, a network of tracts converging from sensory systems to integrating centers in the brain stem. From the more relaxed to the more vigorous levels, sensitivity to novelty is increased.
20 The organism is more awake, more vigilant; this increased vigilance results in the apprehension of ever more subtle signals as the organism becomes more sensitive to its surroundings. The processes of arousal and concentration give attention its direction. Arousal is at
25 first general, with a flooding of impulses in the brain stem; then gradually the activation is channeled. Thus begins concentration, the holding of consistent images. One meaning of intelligence is the way in which these images and other alertly searched information are used in the
30 context of previous experience. Consciousness links past attention to the present and permits the integration of details with perceived ends and purposes.
文章太长，只选了一段

9. The author provides information that would
answer which of the following questions?
□A Why is an aroused herbivore usually fearful?
□B What are some of the degrees of attention in large
mammals?
□C What occurs when the stimulus that causes arousal of
a mammal is removed?
10. According to the passage, as the process of
arousal in an organism continues, all of the
following may occur EXCEPT
(A) the production of adrenaline
(B) the production of norepinephrine
(C) a heightening of sensitivity to stimuli
(D) an increase in selectivity with respect to stimuli
(E) an expansion of the range of states mediated
by the brain stem
为什么第九题B对？是什么意思？第十题D怎么对了，selectivity不是选择，挑剔的意思吗？

steveguangUID: 3406601

大神呢？！

steveguangUID: 3406601

What are some of the degrees of attention in large mammals这句话什么意思？