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【单选题】
当MCS-51单片机进行了外部程序存储器扩展时，P2口的作用是（ ）A.
数据输入口
B.
输出高8位地址
C.
输出低8位地址
D.
数据输出口
手机使用
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反馈参考答案：
举一反三
【单选题】根据《行政诉讼法》的规定，下列各项中，当事人可以提起行政诉讼的案件是（ ）。
A.
对国家财政部发布的新会计法规不服
B.
对行政机关的罚款决定不服
C.
对行政机关对行政机关工作人员的处罚决定不服
D.
国防、外交等国家行为
【单选题】Cultural Puzzle Read the following situation and choose the appropriate answer(s). There may be more than one possible answer. Situation: An American invited a group of Japanese students over to his h...
A.
The Americans must have done something that offended the Japanese.
B.
The Japanese were not having a good time.
C.
Japanese usually leave as a group and try not to stay too long so as not to offend their host.
【多选题】下面有关系统维护的叙述中不准确的有哪些（）
A.
要维护一个系统，必须首先理解这个系统
B.
阅读别人写的程序并不困难
C.
如果文档不齐全也可以维护一个系统
D.
谁编写的系统软件就应由谁来维护这个系统系件
E.
设计系统时就应考虑到将来的可修改性
F.
系统维护是一件很吸引人的创造性工作
G.
维护系统就是改造系统中的错误
H.
维护好一个系统是一件很困难的事
【简答题】Read the following situation and choose the appropriate answer(s). There may be more than one possible answer. Situation: An American invited a group of Japanese students over to his house. He and his...
【单选题】Read the fllowing situation and choose t he appropriate answer(s). There may be more than one possible answer. Situation: American invited a group of Japanese students over to his house. He and his wi...
A.
The Americans must have done something that offended the Japanese.
B.
The Japanese were not having a good time.
C.
Japanese usually leave as a group and try not to stay too long so as not to offend their host.
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