2. 外语
  3. While the polltakers are most widely known for their political surveys, the greatest part of their work is on behalf of American

While the polltakers are most widely known for their political surveys, the greatest part of their work is on behalf of American

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问题     While the polltakers are most widely known for their political surveys, the greatest part of their work is on behalf of American business.  There are three kinds of commercial surveys. One is a public relations research, such as that done for banks, which finds out how the public feels about a company. Another is employee-attitude research, which learns from rank-and-file workers how they really feel about their jobs and their bosses, and which can avert strikes by getting to the bottom of grievances quickly. The third, and probably most spectacular, is marketing research, testing public receptivity to products and designs. The investment a company must make for a new product is enormous--$ 5,000,000 to $10,000,000, for instance, for just one new product. Through the surveys a company can discover in advance what objections the public has to competing products, and whether it really wants a new one. These surveys are actually a new set of signals permitting better communication between business and the general public--letting them talk to each other. Such communication is vital in a complex society like our own. Without it, we would have not only tremendous waste but the industrial anarchy of countless new unwanted products appearing and disappearing.  
This paragraph is developed by means of ______.
选项 A、cause and effect
B、contrast
C、illustrations.
D、anecdotes
答案C
解析 这一段是通过说明的方式展开的。作者提到三种民意调查，并对每一种调查进行了说明。
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