六级Moreover, Krugman overlooks inflation: Prices have increased, six-fold since 1969, so, while corn futures（期货）did set a record of about $8 per bushel（蒲式耳）in late July, the inflation-adjusted price of corn was higher throughout most of the 1970s, reaching $16 in 19 Finally, Krugman conveniently forgets that concerns about global warming are the main reason that corn prices have skyrocketed since 200 Nowadays 40 percent of corn grown in the United States is used to produce ethanol (乙醇), which does absolutely nothing for the climate, but certainly distorts the price of corn — at the expense of many of the worlds poorest people.

此外，克鲁格曼忽略了通货膨胀：自1969年以来，价格上涨了六倍，而玉米期货(期货）确实创下了每蒲式耳8美元左右的纪录(蒲式耳）7月下旬，在20世纪70年代的大部分时间里，经通胀调整后的玉米价格都更高，19年达到16美元

2013年6月六级考试真题（一）

四级As Silicon Valley has become home to more successful companies, the flood of people to the area has caused housing prices to skyrocket.

随着硅谷成为更多成功公司的所在地，该地区的大量人口导致房价飙升。

2020年12月大学英语四级真题（第1套）

四级But in recent years,housing prices have skyrocketed, the region's rich and poor have seg-regated,and middle-class jobs have disappeared.

但近年来，房价飙升，该地区的贫富分化，中产阶级的工作岗位消失。

2020年12月大学英语四级真题（第1套）

考研Quebec’s Drug Insurance Fund has seen its costs skyrocket with annual increases from 14.3 per cent to 26.8 per cent!

魁北克省药品保险基金的成本飙升，每年从14.3%增长到26.8%！

2005年全国硕士研究生入学统一考试英语试题