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【单选题】
以家庭成员为活动对象,达到增进身心健康、促进家庭和睦为主要目的的体育指 ______________。 A、 B、 C、 D、家庭体育A.
学校体育
B.
社会体育
C.
社区体育
D.
家庭体育
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【简答题】英译中（Translate）：chemiosmotic hypothesis（）
【单选题】Constitutional Monarchy was founded in Britain since ____________.
A.
Bill of Rights
B.
the Reformation
C.
the Restoration
D.
the Civil Wars
【单选题】Last month I came to Britain. My English has improved a lot _____ I use it all the time. [ ]
A.
since
B.
while
C.
when
D.
as
【简答题】化学渗透学说( Chemiosmotic theory)
【多选题】How did chemiosmotic processes evolve in stages?
A.
The first stage might have involved the evolution of an ATPase (pump) that pumped protons out of the cell using the energy of ATP hydrolysis. Such a proton pump could have been the ancestor of present-day ATP synthases.
B.
Stage 2 could have involved the evolution of a different proton pump, driven by an electron-transport chain. Indeed, some present-day bacteria that grow on formic acid use the small amount of redox energy derived from the transfer of electrons from formic acid to fumarate to pump H + .
C.
Stage 3 could then link these two systems together to generate an ATP synthase that uses the protons pumped by the electron-transport chain to synthesize ATP.
D.
An early cell with this final system would have had a large selective advantage over cells with neither of the systems or only one.
【简答题】Beijing had its biggest snowfall since 1951. Britain is suffering through its longest cold snap (寒潮) since 1981. And freezing weather is hitting the Deep South, including Florida’s orange groves and b...
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