四六级考试

解析：Why is transition so difficult

2018年07月30日来源:四六级考试 所有评论

【单选题】Why is transition so difficult


A．Because transition requires money and time.
B．Because many manufacturers are unwilling to change their equipment.
C．Because research on new materials is very difficult.
D．Because it takes 10 years.


网考网参考答案：A
网考网解析：
事实细节题。见最后一段：And that transition could prove difficult，for switching requires lengthy research and investment．(实践证明这种转变可能是很困难的，因为该转变需要长期的研究与投资。)A)项正是该句的同义转述。B)、C)两项文中没有涉及；D)项虽然和长期的研究有关，但是文中没有具体到十年这个数字，故排除。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>

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