水溶性染色剂(PI)能与核酸结合而使细胞核着色，可将其应用于鉴别细胞的死活。细胞浸泡于一定浓度的PI中，仅有死细胞的核会被染色，活细胞则不着色，利用PI鉴别死活的基本原理是()
A、死细胞与活细胞的细胞膜结构不同Bloomfielddrewon______psychologywhentryingtodefinethemeaningoflinguisticforms.
Happinessdoesn’talways_______money.
Itwasasmallplacethencomparedto_______itisnow.
InGoDown,Moses,()illuminatestheproblemofblackandwhiteinSouthernsocietyasacloseknitdestinyofbloodbrotherhood.
EzraPound,aleadingspokesmanofthe“()”,wasoneofthemostimportantpoetsinhistime.
