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【单选题】
已知8255的PA端口设置为方式0，输出端口；PB端口设置为方式0，输入端口；PC端口设置为方式0，输出端口。 8255端口地址为288～28BH。在完成上述8255初始化程序后，执行下面的指令实现的操作是（ ）。MOV DX，28BHMOV AL，02HOUT DX，ALA.
PC1输出高电平
B.
PC1 输出低电平
C.
PC0 输出高电平
D.
PC0 输出低电平
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皮皮学刷刷变学霸
举一反三
【单选题】The examiner made us ______ our ID card in order to be admitted to the test center
A.
showing
B.
to show
C.
showed
D.
show
【单选题】听力原文：M: Thank God! I've finished writing that annual report! It takes me almost a whole week. Well, no more overtime, and no more headaches! W: Well, I'm glad to hear it. Have a cup of coffee! Q: What...
A.
Work load.
B.
Writing the service guide.
C.
Coffee.
D.
Holiday plans.
【简答题】[A] to finance [B] financed [C] the finance [D] to be financed
【单选题】How has the BBC been financed?
A.
It's publicly financed.
B.
It's commercially financed.
C.
It's financed through private donations.
D.
It's financed through viewer subscriptions.
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