皮皮学，免费搜题
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搜题
【单选题】
人体铁吸收率最高的部位是A.
回肠远回肓部
B.
升结肠及降结肠
C.
食管及胃
D.
十二指肠及空肠上段
E.
空肠下空肠近段
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皮皮学刷刷变学霸
举一反三
【单选题】Joe, don't ________ now; you're improving all the time. It won't be long _______ you can speak English well. [ ]
A.
give in ; until
B.
give up; before
C.
give in; when
D.
give up; after
【简答题】Don't all speak ____ (同时).
【单选题】强碱滴定弱酸时,只有在下列哪种情况下,可以直接滴定()
A.
c=0.1mol/L
B.
Ka=10-7
C.
cka10-8
【单选题】Jeo, don’t _______ now; you’re improving all the time. It won’t be long ______ you can speak English well. [ ]
A.
give in; until
B.
give up; before
C.
give in; when
D.
give up; after
【简答题】Don't all speak at once! _________ , please.
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