—_______?
—No, she's my sister.[ ]
A. Is that Jim
B. who' that
C. Is that your friend
答案:C
下列哪种病损属一期梅毒
A.阴茎硬性下疳
B.梅毒疹
C.睾丸树胶样肿
D.马鞍鼻
某计算机主频为8MHz,每个机器周期平均2个时钟周期,每条指令平均有2.5个机器周期,则该机器的平均指令执行速度为 ______MIPS。