下列程序返回的结果是a = "first"def second(a): a = "second"def third(): global a a = "third"third()print(a, end=',')second("fourth")print(a)? third, third;|second,third;|second,first|first,second;

Which facts show the American spirit of competition? A: People who like to compete are appreciated. B: There are a lot of expressions of "doing" rather than "being"in their language. C: Americans believe that "friendship first, compitition second". D: Americans learn competition skills since young.

The high point of Churchill’s statesmanship was marked by America’s entry into the Second World War. ("Winston Churchill") A: 正确 B: 错误

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" };

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"}

—Thereisawrongwordinline_________.—Where?—Inthe________line. A: two;two B: two;second C: second;two D: second;second

Africa is________continent in the world. A: second large B: the second large C: second largest D: the second largest

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？_