题目内容
对光污染的解释，最准确的一项是______。
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根据第一段的内容，制取“有价值的生物制剂”的关键条件是______。
宏观经济学一词最早是由英国经济学家凯恩斯于1933年提出来的。 ()
The cost is going【21】for just about everything, and college tuition is no exception. According to a nationwide survey【22】by the College Board's Scholarship Service,【23】at most American universities will be【24】of 9 percent higher this year over last.
The biggest increase will occur at private colleges. Public colleges, heavily subsidized by tax funds, will also【25】their tuition, but the increase will be a few percentage points【26】than their privately sponsored neighbors.
【27】a follow-up, the United Press international did their own study【28】Massachus-setts Institute of Technology. At M. I. T. advisors recommended【29】students have $ 8,900【30】for one year's expenses, including $ 5,300【31】tuition, $ 2,685 for room and【32】, $ 630 for personal expenses, and $ 285 for books and supplies. Ten years ago the tuition【33】only $ 2,150. To【34】that another way, the cost has climbed 150 percent in the last【35】.
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文中画线句子“没有多久，声纳图上又发现新的目标”中“目标”是______。
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