试题与答案

程序在数据段中定义数据如下: NUMS DB 20 DB 53 DB 'JACK'

题型:单项选择题

题目:

程序在数据段中定义数据如下: NUMS DB 20 DB 53 DB 'JACK'则对应下列指令的描述符中正确的是( )。 Ⅰ LEA DX, NUMS Ⅱ MOV CL, [DX+2] Ⅲ MOV BX, NUMS

A.Ⅰ、Ⅲ中指令都正确

B.Ⅰ正确,Ⅲ错误

C.Ⅰ错误,Ⅲ正确

D.Ⅰ,Ⅲ都不正确

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析:在非螺旋CT扫描方式中,准直器打开的宽度等于层厚。

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