class Tank { int level; } public class TestTank { public static void main(String[] args) { Tank t1 = new Tank(); Tank t2 = new Tank(); t1.level = 9; t2.level = 47; System.out.println("1: t1.level: " + t1.level + ", t2.level: " + t2.level); t1 = t2; System.out.println("2: t1.level: " + t1.level + ", t2.level: " + t2.level); t1.level = 27; System.out.println("3: t1.level: " + t1.level + ", t2.level: " + t2.level); } }‍‎

class Tank { int level; } public class TestTank { public static void main(String[] args) { Tank t1 = new Tank(); Tank t2 = new Tank(); t1.level = 9; t2.level = 47; System.out.println("1: t1.level: " + t1.level + ", t2.level: " + t2.level); t1 = t2; System.out.println("2: t1.level: " + t1.level + ", t2.level: " + t2.level); t1.level = 27; System.out.println("3: t1.level: " + t1.level + ", t2.level: " + t2.level); } }

【单选题】享有报价优先推荐和Popular Supplier标识的等级是? A. Level 4 B. Level 1 和 Level 2 C. Level 3 和Level 4 D. Level 1

中国大学MOOC: Abraham Maslow’s Hierarchy of Human Needs are: Level 1 Physical Needs, Level 2 Safety Needs, Level 3 Esteem Needs , Level 4 Social Needs and Level 5 Self-Realization Needs.

The freshman year is the most difficult for all college students because ______. A: they don't know how to live on their own B: they don't know when to study at college level C: they don't know how to study at the college level D: they don't have enough time for study

Read the passage again and choose the best answer to complete each statement.（1--8）1. The Exhibition Hall is on _______. A: Level 1 B: Level 2 C: Level 3

读程序：[img=355x251]17da6b5c578dce1.png[/img]程序中语句df[‘level’] = df.apply(level,axis=1) 的作用是添加一列，列名为’level’,调用level函数，计算等级。

读程序： 程序中语句df[‘level’] = df.apply(level,axis=1) 的作用是添加一列，列名为’level’,调用level函数，计算等级。[img=355x251]17a413172c2ba25.png[/img]

________<br/>means the level for which appropriate additional<br/>protective security measures shall be maintained for a period of time<br/>as a result of heightened risk of a security incident. A: Security level 1 B: Security level 2 C: Security level 3 D: Security level 4

分析下面的JavaScript代码段,输出结果是()varlevel=3;document.write(level==1?"优":level==2?"良":level==3?"中":level==4?"及":"差",""); A: 中 B: 3 C: 差 D: 良