All known techniques for handling complex problems successfully seem to fall into one of the three classes: subdividing the problem(51), ignoring irrelevant detail in a safe way(52), and having an independent agent(53)the internal consistency(contextual checking). The first two provide guidelines for solving the problem, the third serves to provide early warnings. A good programming language supports all three.In subdividing problem, some of the subproblems may be similar to the(54) problem. It leads us to a(55)solution. This(55)solution is viable provided each of the subproblems is easier to solve than the original problem.

●The (75)is designed specifically as a security system for preventing unauthorized communications between one computer network and another computer network.

● A(75) is a device that enables data from one computer to travel to another computer by using telephone lines.

According to Paragraph 3,one problem with the policy is that it may____.

The major cause of problems occurring with fuel injection equipment is（）

The major cause of fuel pump and injection system problems is （）

The major cause of fuel pump and injection system problems is _____.

According to the NAS's report, one of the problems in end-of-life care is

Which Cisco solution was developed to let you create separate networks on one SAN; thus providingyou with improved availability, security, and backup? （）

According to the passage one of the problems for pupils entering secondary schools is that ______.

The best method to secure a towline to bitts is to（）.

● （75） Development is a structured design methodology that proceeds in a sequence from one phase to the next.（75）