使用gcc编译hello.c，并指定输出文件是hello.out，则有效的命令是（ ） 。 A: gcc hello.c B: gcc hello.out C: gcc –c hello.out hello.c D: gcc –o hello.out hello.c

–Hello! Would you like to go to the concert with me tonight? --I’m sorry I can’t. Mother won’t ______ me to go out in the evening.

语句Print Format("HELLO", " A、HELLO: HELLO|He|he|hello

A Clever Bird A man has a bird. It is very clever. Every day the man speaks to the bird.“Hello!”he says. “Hello!”the bird answers.“What are you doing?”says the man.“What are you doing?”says the bird. The man is not at home one day. A thief comes in. He is taking many things.“Hello!”The thief hears the bird's words.“What are you doing?”The thief is very afraid，so he does not take any things and runs out of the house. Question： The thief ________ out of the room. A: walks B: comes C: runs D: goes

​若字符串 s = 'hello world'，则语句 s.ljust(15, '.') 和 s.rjust(15) 的输出结果为？​ A: '....hello world'' hello world' B: 'hello world....'' hello world' C: 'hello world....''hello world ' D: 'hello world....''hello world'

At the beginning of a business call, you should introduce yourself by _______. A: A. saying “Hello, this is xxx from xxx company speaking.” B: B. saying “Hello, I am xxx from xxx company speaking. ” C: C. waiting to be asked. D: D. Just speaking out your name.

编写一个Python程序，输出如下语句 Hello Python Hello Python Hello Python Hello Python Hello Python

以下程序运行后的输出结果是x="hello "print(x*3) A: hello*3 B: hello hello hello C: hello D: hellohellohello

下面代码的运行结果是（ ）。var str= "hello world" ;var str1=str.toUpperCase();var str2=str.toLowerCase() ;alert (str1) ;alert (str2) ; A: "HELLO WORLD","HELLO WORLD" B: "HELLO WORLD","hello world" C: "hello worl","HELLO WORLD" D: "hello world","hello world"

下列嵌套关系正确的是 A: hello B: hello C: hello D: hello