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【单选题】
当溶液的pH与某氨基基酸的pI一致时,该氨基酸水溶液中的存在形式是( )A.
兼性离子
B.
非兼性离子
C.
带单价正电荷
D.
疏水分子
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举一反三
【单选题】Writing a precis______.
A.
takes you a very long time
B.
takes you little time
C.
helps you realize if you really understand a passage
D.
helps you reproduce a passage in your own words
【单选题】According to the passage, the underlined word precis(paragraph 1) means______.
A.
a main point.
B.
a question
C.
a summary
D.
a problem
【简答题】Write out the name of the symbol of Pa ( )
【单选题】Almost every English language examination paper contains a question on writing a precis, or summary, as it is sometimes called. There are two reasons for this. First, examiners recognize that the abil...
A.
how to make an examination paper
B.
the reasons for writing a precis
C.
how to improve your writing skills
D.
the people who write precis
【简答题】Questions 18-20 Question 18 Write NO MORE THAN TWO WORDS OR A NUMBER. Doctors start seeing patients at the Health Centre from 【18】______ o'clock. 【18】
【简答题】函数 的单调减少区间是( )。A. B. C. D.
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