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【单选题】
14 次级溶酶体上具有ATP-质子泵,利用( )的浓度保证内部pH的稳定A.
H +
B.
OH _
C.
PO 4 3_
D.
CL _
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举一反三
【单选题】Tourists and loggers are two examples of people who_______.
A.
are a threat to the tribe
B.
can help the tribe
C.
should contact the tribe
【简答题】Two examples should (2) be enough to explain the point.
【简答题】Why should students not be blamed for their language deficiency? (Paras. 6) List two examples.
【简答题】电阻焊是工件组合后通过电极施加（），利用电流流过接头的接触面及邻近区域产生的（）进行焊接的方法。
【简答题】Tired of bad handwriting, Richie decided to perfect his penmanship (书法) last January. Though the year progressed, his writing didn’t. “My penmanship just got worse,” he says. “I get tired of trying to...
【简答题】Two examples should be enough to explain the point.
【简答题】生物药物常用的定量分析方法有哪些?
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