问题 单项选择题

下列关于计算机病毒的叙述中,正确的是______。

A.反病毒软件可以查、杀任何种类的病毒

B.计算机病毒是一种破坏了的程序

C.反病毒软件必须随着新病毒的出现而升级,提高查、杀毒的功能

D.感染过计算机病毒的计算机具有对该病毒的免疫性

答案

参考答案:C

解析: 反病毒软件可以查、杀病毒,但有的病毒是不可以杀死的。新的计算机病毒可能不断出现,反病毒软件是随之产生的,所以反病毒软件通常滞后于计算机新病毒的出现。

单项选择题
阅读理解

Last week when I was sitting in my office, I heard an elderly lady talking on the phone about her husband. Her husband’s name was Ed. He dropped her off for her doctor’s appointment and was going to park the car and wait for her. She was so upset that she started to cry. I knew I should take action.

The lady told me her name was Helen and she called the restaurant she and her husband were going to have lunch at after her appointment to see if he was waiting for her there. She explained that she thought her husband parked the car in the parking lot and waited for her in the car but she didn’t find him there so she returned to see if he entered the medical building, but Ed was not there either. She regretted making her husband park the car alone since some signs of Alzheimer’ (早老性痴呆症)had appeared in his behavior. I asked a few nurses to help look for Ed inside and out side the medical building according to Helen’s description. Then I offered to drive Helen to the restaurant to see if Ed was waiting for her there.

On arriving at the parking lot of the restaurant, Helen began to search for Ed’s car but she failed, which suggested Ed wasn’t there. We decided to have a talk with the manager before we returned to the hospital. On our way to the manager’s office, I received a call from a nurse, who said they had found Ed. What a relief(安慰)! But we still needed to go on searching since he forgot where he parked his car! Fortunately, we didn’t have much difficulty finding it.

As I waved goodbye to the couple, I thought, “This is true love in life. The love is not romantic but it stays with us all the time.”

1.  What did Helen do after she found Ed was missing?

A. She called the police.     B. She turned to the author.

C. She called the restaurant.  D. She searched for him everywhere.

2.  We learn from this passage that Ed              .

A. went to the restaurant himself     B. might have developed Alzheimer’s

C. visited his friend in the hospital    D. worried about his wife very much

3.  When did the author know that Ed was found?

A. After the author and Helen returned from the restaurant.

B. While the author and Helen were on their way to the restaurant.

C. Before the author and Helen found the manager of the restaurant.

D. When the author and Helen arrived at the parking lot of the restaurant.

4.  What can we infer from the passage?

A. The author was Helen’s friend.    B. The author had seen Ed before.

C. The author went to see his doctor.  D. The author worked in the hospital.