第18题: [单项选择]十六进制数(3D.B)16所对应的二进制数为( ) A. (00111101.1011)2 B. (00111001.1011)2 C. (00111101.1001)2 D. (00111001.1001)2 参考答案:A 答案解析:[解析] 主要考查的知识点为十六进制数与二进制数之间的转换。 [要点透析] 十六进制数转换为二进制数时,其每一位数对应于四位二进制数,(3D.B)16=(00111101.
第30题: [单项选择]Before Venter’s study, it was thought that A. nutrient levels depended on the number of organisms that eat carbon. B. certain viruses keep microbe levels under control. C. bacteria might be responsible for climate change. 参考答案:A