进出口食品标签审核适用于对进出口( )食品标签的审核。
A．预包装 B．内包装 C．外包装 D．固定包装
参考答案：A
2B+D接口B信道的速率是（）承载信道，D信道的速率是16Kbit/s和64kbit/s的信令通路。
I haven't finished my homework yet._____________.
A．so has he
B．Neither he has
C．He has too
D．He hasn't either
