[单选题]f1(t)←→F1(jω),f2(t)←→F2(jω)Then()。A .[af1(t)+bf2(t)]←→[aF1(jω)*bF2(jω)]B .[af1(t)+bf2(t)]←→[aF1(jω)-bF2(jω)]C .[af1(t)+bf2(t)]←→[aF1(jω)+bF2(jω)]D .[af1(t)+bf2(t)]←→[aF1(j&om
[单选题]Iff1(t)←→F1(jω),f2(t)←→F2(jω),Then()A .f1(t)*f2(t)←→F1(jω)F2(jω)B .f1(t)+f2(t)←→F1(jω)F2(jω)C .f1(t)f2(t)←→F1(jω)F2(jω)D .f1(t)/f2(t)←→F1(jω)/F2(jω)
[填空题] J41-F-DN50中“F”表示()。
[名词解释] 缚鸡之力fù jī zhī lì
[名词解释] 老骥伏枥lǎo jì fú lì
[名词解释] 冯骥才Fénɡ Jìcái
[名词解释] 乐府诗集Yuè fǔ shī jí
[名词解释] 缝纫机fénɡ rèn jī