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【单选题】
测定水中的溶解氧，当哪种离子含量高时，需采用高锰酸钾修A.
亚铁离子
B.
钠离子
C.
钾离子
D.
镁离子
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【单选题】My math teacher Mr.Steve is the most creative person I know.
A.
what
B.
who
C.
whose
D.
which
【简答题】人体协调内部的生物信息过程主要涉及两个系统:即()和()。
【单选题】— Do you know the man, _______ son went to the university last night. — Oh, I know He is my teacher in the Junior Middle School.
A.
that
B.
who
C.
whose
D.
whom
【单选题】When I was young, I was silly enough to ____ my teacher to know everything.
A.
tell
B.
beg
C.
ask
D.
except
【单选题】— My teacher punished me this morning. —Why? ______ I know, you’ve done nothing wrong,
A.
as long as
B.
as far as
C.
as well as
D.
as soon as
【单选题】条件致病菌致病的条件是由于
A.
正常菌群的耐药性改变
B.
正常菌群的遗传性状改变
C.
肠蠕动减慢使细菌增多
D.
长期使用广谱抗生素
E.
各种原因造成的免疫功能亢进
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