| Scientific research has revealed that
throughout the animal world, communication is just as important as it is to
human beings. Countless animals lack the{{U}}(67) {{/U}}for human speech, yet
they employ entirely different methods in order to communicate{{U}}
(68) {{/U}}each other. Some of the most dramatic examples of this are
provided by birds. There are roughly 10 000{{U}} (69) {{/U}}of birds in
the world, each of which has its own miraculous features. {{U}} (70)
{{/U}}you may live, you can see a great number of these feathered creatures
and can {{U}} (71) {{/U}}different and extraordinary properties. In
addition to their flawless flight mechanisms, expertise{{U}} (72)
{{/U}}the routes and timing of migrations, and ability to build nests, their
methods to communicate is{{U}} (73) {{/U}}wonder. At critical
times in birds’ lives, A. stimulus B. judgment C. sense D. intelligence 我来回答: 提交
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