举一反三
- def f():st["name"]="x"st={"name":"a","sex":"male"}f()print(st["name"],st["sex"])结果是 A: male B: a male C: x None D: x male
- def f(): st["name"]="x"st={"name":"a","sex":"male"}f()print(st["name"],st["sex"])结果是 A: 错误 B: a male C: x male D: x None
- def f(): st["name"]="x" st={"name":"a","sex":"male"} f() print(st["name"],st["sex"]) 结果是
- def f():st["name"]="x"st={"name":"a","sex":"male"}f()print(st["name"],st["sex"])以上代码运行结果是 A: x male B: a male C: 错误 D: 没有错误，也没有输出
- style="padding-left:0px;">class Student: name="xxx" @staticmethod def show(): name="yyy" print(name,Student.name) @staticmethod def display(): show() s=Student() s.display() 结果：
内容
- 0
下面程序的运行结果是( )。class Student:name="yyy"age=30def __init__(self):self.name="xxx"self.age=20s=Student()Student.name="zzz"print(s.name,s.age,Student.name,Student.age) A: yyy 20 zzz 30 B: xxx 20 zzz 30 C: yyy 20 xxx 30 D: xxx 20 yyy 30
- 1
关系模式department(code,name)、employee(code,name,sex,dept,phone),查询“研发部”的员工信息,查询结果包括code,name,sex,phone,正确的语句是() A: selectcode,name,sex,phonefromemployeewheredept=’研发部’; B: selectcode,name,sex,phonefromemployeeem,departmentdewherede.code=em.deptandde.dept=’研发部’; C: selectcode,name,sex,phonefromemployeeem,departmentdewherede.code=em.codeandde.name=’研发部’; D: Selectem.code,name,sex,phonefromemployeeem,departmentdewherede.code=em.deptandde.name=’研发部’;
- 2
style="padding-left:0px;">class Student:<p style="padding-left:50px;"> name="xxx"<p style="padding-left:50px;"> def show(cls):<p style="padding-left:100px;"> name="yyy"<p style="padding-left:100px;"> print(name,cls.name)<p style="padding-left:0px;">s=Student()<p style="padding-left:0px;">s.show()<p style="padding-left:0px;">结果
- 3
class Student: def __init__(self,n="xxx"): self.name=n def show(self): print(self.name)s=Student("yyy")s.show()结果 A: yyy B: xxx C: None D: 错误
- 4
对象设置属性和属性值的方法正确的是（）。 A: obj.name = "xxx" B: obj["name"] = "xxx" C: obj{name} = "xxx" D: obj->name = "xxx"