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网络适配器的作用是什么?网络适配器工作在哪一层?
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You are a technician at TestKing. Your newly appointed TestKing trainee is setting up a new frame relay connection to a remote branch and wants to know what the valid options for frame relay LMI types are.What would your reply be?（）
车站销售乘意险采取（）原则。
稽核凭证寄递必须遵循（）原则。
Which of the following is TRUE according to the passage?请根据以下内容回答下面的题目 The business cycle is made up of many phases and one of them is the expansion phase which is divided into two parts--recovery and prosperity,During the recovery period there is a growing expansion of existing equipment. And new facilities for production are created. More busines~s are created and older ones expand. Many kinds of important improve- ments are made. People hold increasingly positive view about the future of economic growth. Much capital is invested in machinery or "heavy" industry. More labor is employed, More raw materials are required. As more economy departments develop, other departments are affected. For example, the expansion in automobiles results in an expansion of the steel and rubber indusWies. Roads are required; thus the cement and machinery industries are activated. Demand for labor and materials results in greater prosperity for workers and suppliers of raw materials. This increases the amount of goods bought and sold. This prosperity can be seen among the various parts of the population.This prosperity period may continue to rise without an obvious end, However, when this phase reaches a peak and stops going upwards, it is the end of the expansion phase. Which of the following will happen in economic recovery?
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