已知a+b=3，ab=2，则a2b+ab2=____．
A：Our new school is big and nice. There is a gym in our school now.
B：Yes, and there is a big library, too.
再将该混合物转移到分液漏斗中，振荡，静置后溶液将出现分层现象，然后分液．从分液漏斗放出下层液体，加入适量盐酸，再将其分成两份：向一份溶液中加入三氯化铁溶液，出现的现象是____；向另一份溶液中加入浓溴水，发生反应的化学方程式是____．从分液漏斗上口倒出的上层液体是____．
如图所示，秒表的读数为____s．
