如果要对E盘myfile目录下的文本文件abc.txt进行读操作，文件打开方式应为（ ）。 A: open("e:\\myfile\\abc.txt", "r+" ) B: open( "e:\\myfile\\abtxt", "rb" ) C: open("e:\\myfile\\abc.txt", "r" ) D: open("e:\\myfile\\abc.txt", "x" )

Linux系统中,查看/home/abtxt文件的前20行内容所用到的命令是 A: more -20 /home/abtxt B: less -20 /home/abtxt C: head -20 /home/abtxt D: ls -20 /home/abtxt

下面（）属于声音文件。 A: abwav B: abmpg C: abavi D: abtxt

以下不正确的文件名是（）。 A: ABtxt B: 《日常》.doc C: A?BMP D: song.mp3

Word中插入数学公式的方法是（）。 A: "插入"→"形状"→"公式" B: "开发工具"→"公式" C: "插入"→"公式"→"插入新公式" D: "引用"→"插入"→"公式"

下列文件名中,能与“ABC?.?”匹配的是(2)。 A: AB12.C B: ABCFOR C: ABTXT D: ABCC

定义并初始化一个用于存放我们国家的四个直辖市的数组cityName，四个直辖市为：北京，上海，天津，重庆. 正确的是_________ A: String[] cityName=new String[4]{"北京","上海","天津","重庆"}; B: String[] cityName=new String[]{"北京","上海","天津","重庆"}; C: String[] cityName={"北京","上海","天津","重庆"}; D: String cityName = new String[4] { "北京", "上海", "天津", "重庆" };

已知有一个名为names的空列表,如何向其中添加old_driver,rain,jack,shanshan,peiqi,black_girl 元素？ A: names.append("old_driver","rain","jack","shanshan","peiqi","black_girl") B: names.extend("old_driver","rain","jack","shanshan","peiqi","black_girl") C: names.insert("old_driver","rain","jack","shanshan","peiqi","black_girl") D: names.extend(["old_driver","rain","jack","shanshan","peiqi","black_girl"])

以下哪个选项是正确的json数据格式： A: { "id": 2, "userName": admin, "passWord": 12345, "email": admin@qq.com} B: { id: 2, userName: "admin", passWord: "12345", email: "admin@qq.com"} C: { "id": 2, "userName": "admin", "passWord": "12345", "email": "admin@qq.com",} D: { "id": 2, "userName": "admin", "passWord": "12345", "email": "admin@qq.com"}

把一个JSON格式数据赋给变量color：color = &quot色彩":[ &quot暖色":[&quot红",&quot橙",&quot黄"], &quot冷色":[&quot青",&quot蓝"], &quot中性色":[&quot紫",&quot绿",&quot黑",&quot灰",&quot白"] ]以下能够取到冷色“[&quot青",&quot蓝"]”的是哪一个选项？_