碘量法测定维生素C的含量，应选（）

A．淀粉指示剂

B．喹哪啶红-亚甲蓝混合指示剂

C．二苯胺指示剂

D．邻二氮菲指示剂

E．酚酞指示剂

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