The room is dirty. It _____ for a few days.
A. hasn’t cleaned
B. hasn’t been cleaned
C. was cleaned
D. didn’t clean
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_____ words and idioms you know, _____ English becomes.
A. The more ; the easier
B. The more; the more easy
C. The much; the easy
D. The most; the easiest
在C++中,使用流进行输入输出,其中用于屏幕输入的是
A. cin
B. cerr
C. cout
D. clog
()是指人机之间交换信息的组织形式或语言方式。
A. 信息交换
B. 打字
C. 人机交互方式
D. 语音输入
交互设计的八个黄金法则有(),(),(),(),(),(),(),()。