问题 问答题

请回答以下关于Internet的问题。

电子邮件加密系统包括哪几个哪个是Internet标准

答案

参考答案:著名的电子邮件加密系统有以下两个:PGP(Pretty Good Privacy)和PEM (Privacy Enhanced Mail)。其中,后者是Internet正式邮件加密标准。

阅读理解

阅读理解。

     It was Thanksgiving morning and in the crowded kitchen of my small home I was busy preparing the

traditional Thanksgiving turkey when the doorbell rang. I opened the front door and saw two small children

in rags huddling together inside the storm door on the top step.

     "Any old papers, lady?" asked one of them.

     I was busy. I wanted to say "no" until I looked down at their feet. They were wearing thin little sandals,

wet with heavy snow. 

     "Come in and I'll make you a cup of hot cocoa."

     They walked over and sat down at the table. Their wet sandals left marks upon the floor. I served them

cocoa and bread with jam to fight against the cold outside. Then I went back to the kitchen and started again

on my household budget.

     The silence in the front room struck me. I looked in. The girl held the empty cup in her hands, looking at

it. The boy asked in a flat voice, "Lady, are you rich?"

     I looked at my shabby slipcovers. The girl put her cup back in its saucer carefully and said, "Your cups

match your saucers." Her voice was hungry with a need that no amount of food could supply. They left after

that, holding their bundles of papers against the wind. They hadn't said "Thank you." They didn't need to.

They had reminded me that I had so much for which to be grateful. Plain blue china cups and saucers were

only worth five pence. But they matched.

     I tasted the potatoes and stirred the meat soup. Potatoes and brown meat soup, a roof over our heads, my

man with a good steady job-these matched, too.

     I moved the chairs back from the fire and cleaned the living room. The muddy prints of small sandals were

still wet upon my floor. Let them be for a while, I thought, just in case I should begin to forget how rich I am.

1. Two children came to the writer's front door because _____. [ ]

A. it was Thanksgiving Day

B. they were beggars

C. they wanted old papers

D. they wanted a cup of cocoa

2. Why did the writer let the children in?[ ]

A. She showed great pity on them

B. She had old papers to sell

C. She wanted to invite them to her Thanksgiving feast

D. She wanted them to see how rich she was

3. The girl thought the writer was rich perhaps because _____. [ ]

A. she saw that the lady's room was comfortable

B. she saw the cups matched the saucers

C. the writer's slipcovers were very new

D. the writer was preparing a big meal while she was too hungry.

4. From the passage, we can infer that whether you are rich depends on _____. [ ]

A. how much money you have had

B. how you feel about your life

C. how you have helped others

D. what job your husband is doing

5. The writer left the muddy prints of small sandals on the floor for a while to _____. [ ]

A. show her husband that someone had come

B. remind her that she had helped two children

C. remind her that she was very rich in the neighborhood

D. remind her how life should be

阅读理解与欣赏