A dog has a piece(片) of meat in his mouth. He sees himself(他自己) in the water. He thinks it is another dog. That dog has a piece of meat in his mouth，too. He wants to get(得到) his meat. Then he can have two pieces. He opens his mouth to bark(吠叫) and his meat goes down into(在……里面) the water.

4.4×25可以这样计算：4.4×25＝( ____ ＋ ____)×____，也可以这样计算：4.4×25＝（____×____）×____。

卤素互化物是指不同卤素原子之间以共价键结合形成的化合物，xx，型卤素互化物与卤素单质结构相似，性质相近．试回答下列问题：

试按照实验室用温度计测量液体温度的方法，在下列叙述的步骤中，选择正确的步骤，并把它的编号依次排列：

A．选用测量范围合适的温度计；
B．估计被测液体的温度；
C．读出温度计的示数；
D．把温度计的玻璃泡跟被测的液体充分接触；
E．取出温度计；
F．让温度计与被测的液体接触一段时间，直至温度计内液面稳定。

正确步骤：____ ．