(单选题)

Why can US government computers be easily hacked into?

A.They have no defense systems.

B.They are connected by telephone lines.

C.They are partly accessible to the public.

D.They lack complex processing programs.

参考答案：B

参考解析：

细节理解题。根据第四段第二句“The government’s secrets are easily attacked because thousands of government computers are connected by telephone lines that hackers can get into”可知，是因为成千上万的政府计算机都是用很容易被黑客侵入的电话线连接起来的。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语