你可能感興趣的試題

A.分離點(diǎn)與會(huì)合點(diǎn)一般是實(shí)數(shù)或共軛復(fù)數(shù)對(duì)
B.若實(shí)軸上兩相鄰極點(diǎn)間存在根軌跡，則這兩相鄰極點(diǎn)間必有分離點(diǎn)
C.若實(shí)軸上兩相鄰零點(diǎn)間存在根軌跡，則這兩相鄰極點(diǎn)間必有會(huì)合點(diǎn)
D.若實(shí)軸上根軌跡處在開(kāi)環(huán)鄰零點(diǎn)和極點(diǎn)之間，則二者之間必定有分離點(diǎn)和會(huì)合點(diǎn)

A.90°
B.90°、270°
C.270°
D.無(wú)法確定