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段4：①Yes, new technology has been eating jobs forever, and always will. ②But there’s been an acceleration. ③As Davidson notes, “In the 10 years ending in 2009, [U.S.] factories shed workers so fast that they erased almost all the gains of the previous 70 years; roughly one out of every three manufacturing jobs—about 6 million in total—disappeared.”
23. The quotation in Paragraph 4 explains that .
[A] gains of technology have been erased
[B] job opportunities are disappearing at a high speed
[C] factories are making much less money than before
[D] new jobs and services have been offered
答案：B
问：23题B选项中的at a high speed对应到原文中，是对如下哪项的同义改写？
A : there’s been an acceleration
B : erased almost all the gains of the previous 70 years
C : one out of every three manufacturing jobs disappeared
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