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【单选题】
生物样品预处理的目的不包括( )A.
使药物从缀合物及结合物中释放以便测定游离型药物的浓度
B.
使样品纯化以消除生物基质中内源性物质的干扰
C.
提高检测灵敏度以适应和符合测定方法要求的灵敏度
D.
防止分析仪器的污染和劣化
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举一反三
【单选题】It's too early to predict the ________ of the meeting.
A.
outlet
B.
outbreak
C.
outset
D.
outcome
【单选题】There is no need _______ and it’s no use __________ there too early.
A.
to rush; arriving
B.
to worry; to arrive
C.
worrying; arriving
D.
to rush; to arrive
【单选题】It’s too late. Go to bed right away. Forget you need to get up as early as you can ______ the early train?
A.
catch
B.
catching
C.
caught
D.
to catch
【单选题】— Shall we meet at a quarter to eight ? — That's too early. Let's _____ at half past eight. [ ]
A.
come at
B.
go at
C.
make it
D.
leave at
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