计算机“病毒”，就是计算机感染了病菌。
参考答案：错
笔算加、减法要注意：相同数位要______，从______位算起．
“Freeze, you guy! ________, and I’ll shoot you.” an old man with a gun in hand shouted at me.
A．If you go for one more step
B．Going for one more step
C．One more step
D．You going for one more step
