４８、As people grow older, an enzyme known as PEP increasingly breaks down the neuropeptide chemicals involved in learning and memory. But now, researchers have found compounds that prevent PEP from breaking neuropeptides apart. In tests, these compounds almost completely restored lost memory in rats. The use of these compounds should be extended to students who have poor memory and difficulty in concentrating―and therefore serious problems in school performance. Science finally has a solution for problems neither parents nor teachers could solve.
2016年中考英语词组辨析：every one/ everyone
2016年中考英语词组辨析：in/ on/ to
2016年中考英语词组辨析：in / of
2016年中考英语词组辨析：gift/ present
2016年中考英语词组辨析：foolish/ silly / stupid
2016年中考英语词组辨析：grow/ increase
2016年中考英语词组辨析：heaven/ sky
2016年中考英语词组辨析：if/ whether
2016年中考英语词组辨析：join / join in / take part in
2016年中考英语词组辨析：farther/ further
2016年中考英语词组辨析：good/ fine/ nice/ well
2016年中考英语词组辨析：in time/on time
2016年中考英语词组辨析：have/ own
2016年中考英语词组辨析：know/ know about/ know of
2016年中考英语词组辨析：head/ brains
2016年中考英语词组辨析：harm/ hurt
2016年中考英语词组辨析：know/ recognize
2016年中考英语词组辨析：hand in/ turn in
2016年中考英语词组辨析：interest/ interesting/ interested
2016年中考英语词组辨析：hanged / hung
2016年中考英语词组辨析：known as / known by / known for/ known to
2016年中考英语词组辨析：journey/ trip/ voyage/ tour/ travel
2016年中考英语词组辨析：in / after/ later
2016年中考英语词组辨析：hear/ hear of/ hear from
2016年中考英语词组辨析：grow / keep / raise / plant
2016年中考英语词组辨析：happen/ take place/ occur
2016年中考英语词组辨析：ill/ sick
2016年中考英语词组辨析：in the future/in future
2016年中考英语词组辨析：kind/ sort
2016年中考英语词组辨析：examination/ test/ quiz