第18题: [单项选择]二尖瓣关闭不全患者查体不可能出现的体征有（） A. 抬举样心尖搏动 B. 收缩期震颤 C. S1减弱 D. 可闻及收缩期杂音 E. 杂音向颈部传导 参考答案:E
第19题: [多项选择]Say something about market research (The importance of conducting market research before launching a new product.) 参考答案:Suggested answers: a．When you plan to launch a new product, you must conduct market research first. Market research is essential to launching a new product. Firstly, marketing departments need market research in order to monitor technological change not only within their own industry but also in the industries, which use the product. Secondly, it is needed for more accurate information about trends and changes in market demand. Market research can be used to bridge the information gap between producer and customer. You will have to conduct marketing research before launching a new product. b．Market research is crucial to launching a new product. Another important reason for using market research is to obtain more complete information on competitors. In this way management can react more quickly to changes in competitors’ products and policies. The marketing department also needs to be able to assess potential in a variety of areas including product development so that it can reduce risk, and here too market research can help. Finally, some companies are rarely aware of what is happening in their own markets because there is no direct contract between products and end users. A great many activities should take place before“someone sells something”. Like many adages, this phrase emphasizes a point of great importance to any business or institution, but taken literally it may be misleading or untrue. 答案解析:[解析] conduct market research进行市场调查。launch a new product将新产品投入市场，推出新产品。end users最后用户，直接用户。
