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话音信号釆用数字处理和传输技术的系统是（）。 A.
Inmarsat-C 系统 B.
Inmarsat-B 系统 C.
MF/HF SSB系统 D.
VHF电话系统

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Opponents of gun control believe that __________________.
A、 the right to own and use a gun is given by God
B、 guns deter crime rather than cause crime
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D、 terrorism is more dangerous than domestic shooting