生物碱沉淀反应的条件是 A、酸性水溶液B、碱性水溶液C、中性水溶液D、盐水溶液E、醇水溶液
生物碱沉淀反应的条件是
A、酸性水溶液
B、碱性水溶液
C、中性水溶液
D、盐水溶液
E、醇水溶液
生物碱沉淀反应的条件是
A、酸性水溶液
B、碱性水溶液
C、中性水溶液
D、盐水溶液
E、醇水溶液
A、even though
B、because
C、while
D、but
A、even though
B、therefore
C、but
D、so
A、It was raining but we didn't mind.
B、It was raining so we couldn't play in the garden.
C、While it was raining we stayed indoors.
D、以上都不是——A、B、C都对
A、so
B、but
C、and
D、while
A、despite the fact that
B、as soon as
C、any time,when
D、except if
A、It was my birthday so I could eat what I liked!
B、It was my birthday but I was given loads of presents.
C、Even though it was my birthday, I decided to go out and celebrate.
D、It was my birthday because I had to go to work.
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