算机病毒是一个在计算机内部或系统之间进行自我繁殖和扩散的程序，其自我繁殖是指（）。
A、复制
B、移动
C、人与计算机间的接触
D、程序修改
参考答案：A
Read and order. 读一读，给下列句子重新排序。
( ) I want to fly kites with my father. But he is working.
( ) OK. Let's go.
( ) Hi, Li Ming. What do you want to do?
( ) Yes, I like to play it.
( ) Oh, poor Li Ming. Do you like to play ping-pong?
( ) Would you like to play it with me?
锌的每日摄取量应该是（）
A、1-4mg
B、6-12mg
C、13-15mg
D、15-20mg
