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搜题
【单选题】
制备稳定的混悬剂，需控制ζ电位的范围是A.
20～40mV
B.
30～50mV
C.
20～25mV
D.
10～25mV
E.
25～35mV
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反馈参考答案：
举一反三
【单选题】________, he had asked three persons before he got there.
A.
Not knowing where was the bookstore
B.
Knowing not where the bookstore was
C.
Not knowing where the bookstore was
D.
Not to know where the bookstore was
【单选题】______, he had asked three persons before he got there.
A.
Not knowing where was the bookstore
B.
Not knowing where the bookstore was
C.
Knowing not where the bookstore was
D.
Not to know where the book store was
【单选题】He asked three men Bob, Joe, and ____________ to be ready for the journey.
A.
I
B.
her
C.
me
D.
himself
【单选题】He has asked three classmates for a certain answer but has a different reply.
A.
each
B.
either
C.
none
D.
neither
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