... three-quarters a decade ago.down是什么词性呢?down from这里是做定语修饰population吧?③Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored because they enhance reproduction or survival, but are simply random by...
Their differences, and perhaps even more importantly, their similarities, provide a lens through which to view the differing fortunes of both countries.
对于含有 ago 短语的句子,如果要对这个短语提问,是该用when,还是该用how long ago。如:He joined the company five years ago.如果对 five years ago 提问,应该用下面的哪一句?When did he join the company?How long ago did he join the company?
...uo; he said,“once I knew I was leaving, I used to go outside at lunchtime and watch as【2. 这里的 as 是什么意思?】 the buses drove up and down. The time had come. His passion was awakened as a boy growing up in Sheffield, where he collected bus maps and time-tables. But Mr. Burgin ,f...
1. According to a tax rate formula for a certain year, the amount of tax owed by an individual whose annual income was between $31,850 and $77,100 was equal to a base tax of $4,386 plus 24 percent of the annual income that exceeded $31,850. According to this formula, what was the amount of tax owed ...