皮皮学，免费搜题
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【单选题】
高效液相测定含氮碱性药物时,加入扫尾剂,其作用是( )。A.
抑制或掩蔽固定相表面的游离硅醇基的活性
B.
增加含氮碱性药物的稳定性
C.
形成动态离子对固定相
D.
使固定相表面形成层
E.
增加了被测物的脂溶性
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皮皮学刷刷变学霸
举一反三
【单选题】______who are interested in the job please get in touch with us as soon as possible by telephone or e - mail．
A.
Those
B.
Anyone
C.
These
D.
No matter
【简答题】看图，回答你所听到的问题。 Is this a watch? __________ What's your telephone number? __________ What's this? __________ Is this your watch? __________ Is this your computer? __________
【简答题】Tony, the telephone(ring) ______ . Please answer it quickly.
【单选题】Please _____ me when you arrive . [ ]
A.
make a telephone call
B.
ring up
C.
call
D.
give a telephone
【简答题】Please tell me the (win) telephone number, t want to interview him.
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