气与津液关系不包括
A. 气能生津
B. 气能行津
C. 气能摄津
D. 津能载气
E. 气能载津
对最高频率为fH的调制信号m(t)分别进行AM、DSB、SSB调制,相应已调信号的带宽分别为()、()、()。
Write a composition of about 100 words on "How Did You Feel at the End of Your First Day as a College Student?" You may begin your composition with "I was tired after a long overnight train ride when I arrived."