题目内容：
The key to the future of industry may lie in“flexing up and down”of the workforce.
参考答案：
答案解析：
单选题：The key to the future of industry may lie in“flexing up and
- 题目分类：英语四级
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听录音，回答题 Learning to play a musical instrument can change your brain, with a U
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Ad campaigns help companies like Chevron raise their ranks of green reputation．
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