第19题: [单项选择]将1101010100转换成十六进制数为______。 A. 354H B. 654H C. 6A4H D. E60H 参考答案:A 答案解析:[解析] 从个位数开始向左按每四位一组划分,不足四位前面以零补足,得0011 0101 0100。将每组代之以一位十六进制数字,得354H。
第27题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. B.It is the first suspension bridge built in the US B. C.It is the first suspended railway bridge in the US 参考答案:D 答案解析:[听力原文] 29-31 Manhattan Island is surrounded on the east by the East and Harlem Rivers and on
第28题: [单项选择]计算年长儿童的剂量时,应选用剂量的下限的是() A. 根据儿童年龄计算 B. 根据儿童体重计算 C. 根据儿童体表面积计算 D. 按成人剂量折算表计算 E. 以上均不是 参考答案:B