A:which season you like best
B:when we shall visit uncle Li
C:where the Students Cinema i
D:who you are waiting for
如图,如图,共有____条射线.
.
将一定质量的铁粉加入盛有100g质量分数为16%硫酸铜溶液的烧杯中,充分反应后过滤,测得滤液的质量为99.6g.则该反应过程中,参加反应的铁的质量是( )
a.载玻片上滴红细胞稀释液→b.盖上盖玻片→c.观察→d.滴蒸馏水→e.观察.