从竞争结构角度分析，对钢铁公司而言（）。
Ⅰ.已建钢铁公司属于现有竞争者
Ⅱ.铁矿石开采企业属于供给方竞争力量
Ⅲ.汽车生产企业属于需求方竞争力量
Ⅳ.拟建钢铁公司属于潜在入侵者

I knew almost everyone I needed to know no matter whether they ______goodness or badness.

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They’re not allowed contact with the outside world or any substances that haven’t been fully ____.

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Because of such factors, engineers have worked on increasing the efficiency of elevators, resorting to double-decker cars to service and to transfer systems that ______ express and local elevators.

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Many states have ______, amended or repealed laws to improve school nutrition.

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Advertising is ______ into every aspect of our social life, and conveying cultural messages with the advantage of mass media.

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Ellen Brown says the exercises help ______ her pain and stiffness from arthritis.

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The monitor has（ ）us of tomorrow’s meeting.

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He spent ages ______ for a pay increase，only to resign from his job soon after he’d received it.

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In the past men generally preferred that their wives（ ）in the house。

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Josh graduated with his master’s degree in space studies and planetary sciences，but after years of working odd jobs and barely______，he decided to go back to get his teaching license。

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