根据网考网考试中心的统计分析，以下试题在2019/9/8日MBA习题练习中，答错率较高，为：92%
【单选题】
Over an extended period of time it is possible for potential firms to enter or for existing firms to leave a competitive industry. In the competitive world, shifts in the productive {{U}} (1) {{/U}} of the economy from any one line of production to others would {{U}} (2) {{/U}} in this way. The length of the time period {{U}} (3) {{/U}} for entry and/or exit will vary, depending upon the {{U}} (4) {{/U}} involveD、Some, like hot dog stands, may be easily and quickly {{U}} (5) {{/U}}. Others, like textile mills, will require a longer planning and construction perioD、Whatever the time {{U}} (6) {{/U}} necessary for firms to enter or exit a given industry, we {{U}} (7) {{/U}} that period as the long run for that industry. For different industries, the long run will encompass different time spans.
The force that {{U}} (8) {{/U}} the entry of new firms into an industry is profit {{U}} (9) {{/U}} . When the firms in an industry are making profits, they provide the investors in those firms with higher-than-average returns on their investments. Higher-than-average returns seldom go {{U}} (10) {{/U}}. In the long run they attract new investment and new firms. On the other hand, losses provide the {{U}} (11) {{/U}} for firms in an industry to leave it. Losses mean that returns to investors in the industry are below the average received by investors economy-wide; however, they do not necessarily {{U}} (12) {{/U}} that the net income of the firm is {{U}} (13) {{/U}}. It may or it may not be.But investors will want to withdraw their investments from the loss-incurring industry and {{U}} (14) {{/U}} in other industries where the returns will be greater.
Where profits exist, returns on investment are above average. Where losses occur, returns are below average. So investment is {{U}} (15) {{/U}} being redirected from less valuable to more valuable uses.
B．look forward to
C．see to
D．contribute to
网考网参考答案：A，答错率：92%
网考网试题解析：
本题测试惯用搭配。refer to意为“提到，谈到”；look forward to意为“期盼，期待”；see to意为“照料，注意”；contribute to意为“促成，捐献”。所填之词的宾语是that period，所以应该选refer to。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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