In the center of the vortex is Citigroup, whose 【precipitous】 stock-market plunge sped up on Thursday, sending shock waves through the financial world.
In the center of the vortex is Citigroup, whose 【precipitous】 stock-market plunge sped up on Thursday, sending shock waves through the financial world.
A、precarious
B、falling sharply
C、perspiring
D、increasing quickly
【正确答案】：B
【名师解析】:选项B "falling sharply" 是正确的答案。在这里，"precipitous" 意为 "陡峭的" 或 "急剧下降的"，与句子中描述的 Citigroup 股票市场暴跌的情况相符。选项A "precarious" 意味着 "不稳定的" 或 "危险的"，选项C "perspiring" 意为 "出汗"，选项D "increasing quickly" 表示 "迅速增加"，这些选项都不符合句子的语境。因此，"falling sharply" 最准确地描述了 Citigroup 股票的急剧下跌。
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