哪个选项中的代码中能够输出以下结果( ):[img=426x71]17d60e539f4734f.png[/img] A: 代码:print("a=10b=20a+b=30") B: 代码:print("a=10\tb=20\na+b=30") C: 代码:print("a=10\b=20\na+b=30") D: 代码:print("a=10b=20a+b=30")
哪个选项中的代码中能够输出以下结果( ):[img=426x71]17d60e539f4734f.png[/img] A: 代码:print("a=10b=20a+b=30") B: 代码:print("a=10\tb=20\na+b=30") C: 代码:print("a=10\b=20\na+b=30") D: 代码:print("a=10b=20a+b=30")
如果要指定当前网页在客户端缓存中的有效期为30分钟,则正确的选项为( )。 A: <meta http-equiv="refresh" content="30″ /> B: <meta http-equiv="pragma" content="no-cache″/> C: <meta http-equiv="expires" content="1800″/> D: <meta http-equiv="expires" content="30″/>
如果要指定当前网页在客户端缓存中的有效期为30分钟,则正确的选项为( )。 A: <meta http-equiv="refresh" content="30″ /> B: <meta http-equiv="pragma" content="no-cache″/> C: <meta http-equiv="expires" content="1800″/> D: <meta http-equiv="expires" content="30″/>
JavaScript语句 var a1=10; var a2=20; alert("a1+a2="+a1+a2); 将显示()结果 A: a1+a2=1020 B: a1+a2=30 C: a1+a2=a1+a2 D: "a1+a2="+a1+a2
JavaScript语句 var a1=10; var a2=20; alert("a1+a2="+a1+a2); 将显示()结果 A: a1+a2=1020 B: a1+a2=30 C: a1+a2=a1+a2 D: "a1+a2="+a1+a2
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"
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"
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" };
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" };
关于赋值语句,以下选项中描述错误的是 。 A: 在Python语言中,"="表示赋值,即将"="右侧的计算结果赋值给左侧变量,包含"="的语句称为赋值语句 B: 设a = 10; b = 20,执行"a,b = a,a + b;print(a,b)" 和 "a = b;b = a + b;print(a,b)"之后,得到同样的输出结果:10 30 C: 设x = "alice";y = "kate" ,执行"x,y = y,x"可以实现变量x和y值的互换 D: 在Python语言中,有一种赋值语句,可以同时给多个变量赋值
关于赋值语句,以下选项中描述错误的是 。 A: 在Python语言中,"="表示赋值,即将"="右侧的计算结果赋值给左侧变量,包含"="的语句称为赋值语句 B: 设a = 10; b = 20,执行"a,b = a,a + b;print(a,b)" 和 "a = b;b = a + b;print(a,b)"之后,得到同样的输出结果:10 30 C: 设x = "alice";y = "kate" ,执行"x,y = y,x"可以实现变量x和y值的互换 D: 在Python语言中,有一种赋值语句,可以同时给多个变量赋值
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"])
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"}
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 = "色彩":[ "暖色":["红","橙","黄"], "冷色":["青","蓝"], "中性色":["紫","绿","黑","灰","白"] ]以下能够取到冷色“["青","蓝"]”的是哪一个选项?_
把一个JSON格式数据赋给变量color:color = "色彩":[ "暖色":["红","橙","黄"], "冷色":["青","蓝"], "中性色":["紫","绿","黑","灰","白"] ]以下能够取到冷色“["青","蓝"]”的是哪一个选项?_
在Excel中,为表格添加边框的正确的操作是()。 A: 单击"单元格"中的"边框" B: 单击"单元格"中的"边框和底纹" C: 单击"插入"中"边框" D: 单击"插入"中"单元格"
在Excel中,为表格添加边框的正确的操作是()。 A: 单击"单元格"中的"边框" B: 单击"单元格"中的"边框和底纹" C: 单击"插入"中"边框" D: 单击"插入"中"单元格"