TRU给下列哪个汇流条供电?
A、DC MAIN BUS 1
B、DC MAIN BUS 2
C、DC ESSENTIAL BUS
D、HOT BUS
参考答案:C
—Shall I lock the lab now before I go home?
—________.I'll check it myself later.
A.Go ahead
B.No problem
C.No hurry
D.Don't bother
简述高效液相色谱法分析水中酚类化合物时,应如何选择洗脱溶剂。