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【单选题】
各种酶都具有最适 pH,其特点是:A.
最适pH一般即为该酶的等电点
B.
最适pH时酶与底物结合能力较强
C.
最适pH时酶分子的活性通常较低
D.
大多数酶活性的最适pH曲线为抛物线形
E.
在生理条件下同一细胞内酶的最适pH均相同
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【单选题】女性患者,30岁,月经来潮期间有乳房胀痛,两侧乳房内发现有多个大小不等、质地坚韧的结节状肿块,首先考虑
A.
乳腺癌
B.
乳腺囊性增生病
C.
乳管内乳头状瘤
D.
乳房纤维腺瘤
E.
乳房脂肪瘤
【简答题】听下面一段对话，回答第1至2题。 1. Where did Mary meet the American girl? A. In the library. B. At a bus stop. 7. What were Mary and the American girl talking about? A. How to get to the City Library. B. Borrowing b...
【单选题】The building_________ will be used as a library when completed. [ ]
A.
built
B.
to be built
C.
being built
D.
being building
【单选题】Most of the students in my class like to _________ books from the library. [ ]
A.
borrow
B.
keep
C.
buy
D.
have
【单选题】The students were ____ over the ____ problem, listening to the teacher with a ____ expression on
A.
24.The students were ____ over the ____ problem, listening to the teacher with a ____ expression on their faces. A．puzzled; puzzling; puzzling
B.
puzzled; puzzling; puzzled
C.
puzzling; puzzling; puzzled
D.
puzzling; puzzled; puzzling
【单选题】The teacher together with the students ________ discussing Reading Skills that _______ newly publ
A.
24．The teacher together with the students ________ discussing Reading Skills that _______ newly published in America. A．are; were
B.
is; were
C.
are; was
D.
is; was
【单选题】The purpose of education _____ be to provide students with a value system－－－－not to prepare them
A.
24．The purpose of education _____ be to provide students with a value system----not to prepare them for a specific job. A．will
B.
should
C.
could
D.
May
【单选题】女性患者,30岁,月经来潮期间有乳房胀痛,两侧乳房内发现有多个大小不等、质地坚韧的结节状肿块,首先考虑
A.
乳癌
B.
乳腺囊性增生病
C.
乳管内乳头状瘤
D.
乳房纤维腺瘤
【单选题】女性患者,30岁,月经来潮期间有乳房胀痛,两侧乳房内发现有多个大小不等、质地坚韧的结节状肿块。该病多好发
A.
乳晕内
B.
乳房内上象限
C.
乳房内下象限
D.
乳房外上象限
E.
乳房外下象限
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