问题 填空题

为避免一些不可抗拒的意外因素对系统数据造成的毁灭性破坏,最有效的方法是对系统进行 【16】

答案

参考答案:数据备份

解析: 系统中的数据是在系统运行过程中逐步积累和更新而来的。当意外情况发生时,用备份数据恢复原来的系统和数据是最有效的方法。

判断题
阅读理解

阅读理解。

     Dogs are social animals and without proper training, they will behave like wild animals. They will spoil

your house, destroy your belongings, bark excessively (过分地), fight other dogs and even bite you.

Nearly all behavior problems are perfectly normal dog activities that occur at the wrong time or place or

are directed at the wrong thing. The key to preventing or treating behavior problems is learning to teach

the dog to redirect its normal behavior to outlets that are acceptable in the domestic setting.

     One of the best things you can do for your dog and yourself is to obedience train (驯服) it.

Obedience training doesn't solve all behavior problems, but it is the foundation for solving just about any

problem. Training opens up a line of communication between you and your dog. Effective communication

is necessary to instruct your dog about what you want it to do.

     Training is also an easy way to establish the social rank order. When your dog obeys a simple request

of "come here, and sit", it is showing obedience and respect for you. It is not necessary to establish

yourself as top dog or leader of the dog pack (群)by using extreme measures. You can teach your dog

its subordinate (从属的) role by teaching it to show submission (服从)to you. Most dogs love performing tricks for you to pleasantly accepts that you are in charge.

     Training should be fun and rewarding for you and your dog. It can enrich your relationship and make

living together more enjoyable. A well-trained dog is more confident and can more safely be allowed a

greater amount of freedom than an untrained animal.

1. The author wrote the passage in order to       .

A. teach people on how to train the dog

B. remind people to give their dogs some proper training

C. warn people to avoid the wild dogs

D. tell the differences between well-trained dogs and untrained ones

2. What is the main idea of Paragraph 2?

A. Obedience training can make your dog obey your orders.

B. You should use effective methods to train your dogs.

C. Obedience training is essential to the dogs though it can't solve all behavior problems.

D. Effective communication is a must for your dogs.

3. A well-trained dog      .

A. accepts that you are in charge and shows obedience and respect for you

B. can understand whatever you want it to do

C. can make you more confident

D. will affect your social relationship

4. The author explains his idea mainly by     .

A. giving examples  

B. stating facts  

C. listing data    

D. answering questions