（1）指出下列符号的微观含义

O______2O______O₂______2O₂______

K⁺______2S^2-______

（2）指出下列符号中数字的含义

3CO₂“3”______，“2”______，“1”______

(71) data effectively is crucial for success in today’s competitive environment. Managers must know how to use a variety of tools. Integrated data takes information from different sources and puts it together in a meaningful and useful way. One of the difficulties of this is the (72) in hardware and software. (73) integration uses a base document that contains copies of other objects. (74) integration uses a base document that contains the current or most recent version of the source document it contains. (75) provides an overview of the program written in" plain" English, without the computer syntax.

72（）

A．similarity

B．interoperability

C．diversity

D．interaction