BPSK
参考答案：二进制移相键控，即二进制数据的逻辑值改变时发送的载波相位就改变180度。
--I think our school’s selective courses are of great use and I have learnt a lot from them.
--Yes _______.
A．No problem
B．I couldn’t agree more
C．I don’t think so
D．It doesn’t matter
飞机总装配工作的主要内容？
