[填空题]What are the main functions of a firewall system
A. A．It protected packets of information from being raided
B．It can break everything up into little packets
C．It can meet the world demand of the generic plug-in card.

[单项选择]
What are the main functions of a firewall system A. It protected packets of information from being raided. B. It can break everything up into little packets. C. It can meet the world demand of the generic plug-in card.

[简答题]What language skills are emphasized and what main techniques are used in the Direct Method classroom

[单项选择]

The immune system is equal in complexity to the combined intricacies of the brain and nervous system. The success of the immune system in defending the body relies on a dynamic regulatory communication network consisting of millions and millions of cells. Organized into sets and subsets,these cells pass information back and forth like clouds of bees flying around a hive (蜂巢). The result is a sensitive system of checks and balances that produces an immune response that is prompt, appropriate effective, and self-limiting.
At the heart of the immune system is the ability to distinguish between self and no self. When immune defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quickly to eliminate the intruders(入侵者). Virtually every body cell carries distinctive molecules that identify it as self. The body’s immune defenses do not normally attack tissues
A. The immune system’s memory.
B. Immune troops eliminating intruders.
C. Bees flying around a hive.
D. A sea of microbes.

[简答题]Describe the structure and functions of the main civil courts in the English legal system, including the Supreme Court. (10 marks)

[单项选择]What main role do the staff play in the school restaurant
A. They make sure that students eat their meals in time.
B. They deal with students’ complaints about the food.
C. They help students learn about a balanced diet.

[单项选择]TCP functions at the Open System Interconnection (OSI) (61) layer, or Layer 4. Its chief responsibility is to ensure (62) end-to-end connectivity. IP, located one layer down, at the OSI network layer, or Layer 3, communicates the addresses of each (63) sender and receiver to the routers along the way. Routers and Layer 3 switches can read IP and other Layer 3 (64) . This information, combined with routing tables and other network intelligence, is all it takes to get (65) the room or around the world via TCP/IP.

A. better
B. protocols
C. protocol
D. good