下列80X86指令中，不合法的指令是( )。 A．IN AX，0378H

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问题单项选择题

下列80X86指令中，不合法的指令是( )。

A．IN AX，0378H
B．MOV BL，AL
C．MOVSB
D．SHL AX，1

答案

参考答案：A

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Dear Miss Wang,

I live in a boarding school and I go home every weekend. But when I came back to school this Monday, I found my wallet with all my money and identity cards had been stolen. I haven’t told my parents because they will be angry. Now I have to borrow money from my classmates .I’m so sad that I cannot concentrate (集中注意力) on my studies. Can you help me?

Yours,