R中，利用什么命令可以加载已经安装的fun包？
A: library(fun)
B: install.packages("fun")
C: remove.packages("fun")
D: required(fun)
A: library(fun)
B: install.packages("fun")
C: remove.packages("fun")
D: required(fun)
举一反三
- 假设函数fun已经定义，其原型为“void fun(int a,int b=7,char*p="*");”下列函数调用中错误的是______。 A: fun(5) B: fun(5,8) C: fun(6,"##") D: fun(0,0,"==")
- 下列哪些语句可以定义名为fun的函数 A: function fun(a){alert(a);} B: var fun=function(a){alert(a);} C: var fun=Function("function fun(a){alert(a);} D: fun(a)
- _______it is to listen to music! A: What fun B: How a fun C: What a fun D: How fun
- At tea-time the family had （） A: no fun B: a little fun C: little fun D: a lot of fun
- 下面那个程序代码是正确的_________ A: print("Programming is fun") print("Python is fun") B: print("Programming is fun")print("Python is fun") C: print("Programming is fun)print("Python is fun") D: print("Programming is fun)print("Python is fun")