举一反三
- 【单选题】生成如下数据框的语句是? weight height gender age 1 80 180 male teen 2 75 170 male teen 3 60 165 female adult 4 52 150 female adult A. X ,gender=c("male", "male", "female", "female"),age=c("teen","teen","adult","adult")) B. X ,gender=c("male", "male", "female", "female"),age=c("teen","teen","adult","adult")) C. X ,gender=c(male, male, female, female),age=c(teen,teen,adult,adult)) D. X ,gender=c("male", "male", "female", "female"),age=c("teen","teen","adult","adult"))
- 人们一般用 “gender”来表示生理性别， 或 male 或 female
- 人们一般用“gender”来表示生理性别，或male或female
- On a resume, the correct information about gender is （ ）. A: Female B: Man C: Woman D: Male
- import java.io.*; class Person{ public void print(){System.out.print("Person ");} public void printMyGender(String s){ this.print(); System.out.print(s+" "); } } class Gender{ String type="gender"; public void print(Person p){p.printMyGender(type);} } class Female extends Gender{ public Female(){ type="female"; } } class Male extends Gender{ public Male(){ type="male"; } } class Employee extends Person{ public void print(){ System.out.print("Employee ");} } class Manager extends Employee{ public void print(){ System.out.print("Manager ");} } public class Test{ public static void main(String[] args){ Manager man = new Manager(); Employee em = new Employee(); Gender gender1 = new Male(); Gender gender2 = new Female(); gender1.print(man); gender2.print(em); } } 对于以上代码，其运行结果是
内容
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German has three _______but French only has two. A. genders B. gender C. male D. female
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In The lottery,traditional _____ and ____ divisions are analyzed. A: Social/gender B: Male/female C: Rich/poor D: Smart/dumb
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下面哪一条语句不正确： A: enum Gender{female, male}; B: struct Person{ char name[20]; Gender sex; C: Person father; D: };Person members[30];
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补全以下遍历对象的代码 var data = { name: "Alex", age: 18, gender:"Male", weight:"70KG" } for (var x in data){ console.log(x+":"+_______) //输出格式: key:value[br][/br] }
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What is the finding of the new study? A: The gender divide is a big concern of the general public. B: Men and women understand economics quite differently. C: The gap between male and female economists needs to be closed. D: Male and female economists disagree widely on economic policy.