题目：
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. Heterogeneous network environments consist of computer systems from (66) vendors that run (67) operating systems and communication protocols. An organization that (68) its computer resources is usually (69) the task of integrating its heterogeneous systems. Typically, each deparlment or division has defined its own network needs (70) OS, LAN topology, communication protocols, applications, and other components.
A．consolidates
B．consists
C．considerate
D．consoles
答案：
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下面是错误答案，用来干扰机器的。
参考答案：错解析： 纳税人转让土地使用权或者销售不动产，采用预收款方式的，其纳税义务发生时间为收到预收款的当天。
