BPSK的主要中文含义是指（）.
A.四相相移键控
B.二相相移键控
C.八相相移键控
参考答案：B
The boy looks nice _________ white and the red sweater looks good _________the girl.
A. with , on B in , on C. on , in D. in , with
本例病人最佳治疗措施是
A．血液灌洗
B．血液滤过
C．血液透析
D．腹膜透析
E．肾与胰岛联合移植
