液相色谱
参考答案:
流动相的相态为液相的色谱法。
量取10mL液体,最好选用下列哪种量程的量筒( )
A.5 mL
B.10 mL
C.25 mL
D.50 mL
Great changes have taken place ___. [ ]
A. in the last few year
B. in the last few years
C. last year
D. on the last year