下列不属于染色体非稳定性畸变的是
A.双着丝粒体B.着丝粒环C.倒位D.无着丝粒断片E.无着丝粒环
参考答案:C
解析:倒位不属于染色体非稳定性畸变。
分离培养脑膜炎奈瑟菌选用
A.血平板 B.沙保培养基 C.巧克力色培养基 D.罗氏培养基 E.疱肉培养基
Exercise helps ______. [ ]
A. to keep health
B. to keep in good health
C. keeping healthy