生长状况良好的细胞,不具备下面哪项镜下观察特征?()
A. 折光性弱
B. 透明度大
C. 边缘整齐
D. 轮廓不清
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()污染的典型特征是细胞培养液短期内变黄且明显浑浊。()
A. 支原体
B. 病毒
C. 细菌
D. 真菌
肉眼观察细胞培养物,短期内未见培养液混浊,但在培养液中有白色或浅黄色漂浮物,可判断为()污染。
A. 支原体
B. 病毒
C. 细菌
D. 真菌
镜下观察细胞培养物,可见丝状、管状或树枝状菌丝,并悬浮飘荡在培养液中,可判断为()污染。
A. 支原体
B. 病毒
C. 细菌
D. 真菌
quote, cite & repeatPut into each gap one of the above words. Change the form where necessary.1.I promised not to __________ the secret.2.The judicial minister__________the latest crime figures as proof of the need for strengthening the comprehensive administration of social public order.3.You may__________a passage from the book.4.Be careful or somebody will overhear what you say and may__________it afterwards.