What does “ an albatross around their necks ” mean in “ For many millennials and now Gen Z , a four - year college degree has become an albatross around their necks "?
A. sth . that causes an important change or event to happen
B. sth . that stands for their only achievement after years of schooling
C. sth . that causes them great problems from which they can ＇ t escape
D. sth . that encourages them to work harder in this era of fierce competition
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Which of the following has the same meaning with “ proposition ” in “ The flagging value proposition is now catching up to coleges "?
A. Getting a work permit in the UK is not always a simple proposition .
Both its sponsors and its opponents regard Proposition 23 as a weathervane .
C. You came to see me at my office the other day with a business proposition .
D. It ’ s an accepted proposition that we have a duty to protect endangered animals .
目前轿车上的前后保险杠的材质是（ ）。
A. 钢铁
B. 塑料
C. 铝合金
汽车塑料件按热性能分有热固性塑料和（ ）。
A. 热塑性塑料
B. 冷塑性塑料
C. 热熔性塑料
热空气塑料焊接时喷出的热风主要是吹（ ）。
A. 基底材料
B. 焊条
C. 焊缝
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