食品袋上所标的500克+3克，意思为比500克多3克，那么500克-3克，意思就是比500克少3克。[ ]
正确
His MP5 is very useful, _______?[ ]
A. isn't it
B. is it
C. does it
D. doesn't it
省局实行新闻发言人制度，新闻发言人由（）担任，代表省局对外发布税收新闻。
A.局领导
B.办公室主任
C.办公室副主任
D.办公室业务骨干
