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  3. Predictions of large populations of robots in industry have yet to come true. For a decade or more, manufacturers of big robots

Predictions of large populations of robots in industry have yet to come true. For a decade or more, manufacturers of big robots

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问题     Predictions of large populations of robots in industry have yet to come true. For a decade or more, manufacturers of big robots have explained how their machines can make industry more competitive and productive. The market for【C1】______robots is now oversupplied.and the driving force of the robotics(机器人技术)revolution is【C2】______to be with makers of machines that handle a few kilos at most.
    "Heavy-robot manufacturers are in some difficulty【C3】______finding customers. They are offering big【C4】______just to get in the door. There has been a【C5】______growth everywhere in the numbers of robots,so we have to admit we are either deceiving【C6】______or that the market is slowly growing,"said John Reekie,Chairman of Colne Robotics. "The following things must happen【C7】______the robotics revolution to occur. We must achieve widespread robot literacy(文化), 【C8】______there has been a computer literacy program,there must be a robot literacy campaign. We must also【C9】______not just a cut in,but a collapse of robot prices.【C10】______，some kind of artificial intelligence needs to be available".
【C3】
选项 A、to
B、with
C、over
D、in
答案D
解析 “to be in difficulty in doing something”，"have difficulty in doing something"均为介词短语固定用法，意为“对做……有困难”，故D应为答案。
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