单项选择题
Which of the following statements is true（）
A．Many computers were attacked by a virus in the U. S. B．Many computers attacked by a virus in the U.S. lost their information. C．A computer virus can harm human body. D．A computer virus can help the computer owner do many things.
单项选择题 A computer virus （）
单项选择题 35（）
单项选择题 34（）
