双引号your_name='runoob'‎str="Hello, I know you are \"$your_name\"! \n"‎echo -e $str‎输出结果为：‎Hello, I know you are "runoob"! ‌‎

It is surprising that you don’t know about such a(n) ______(history) event. It marked the beginning of a new period for our nation.

人从不知到知有以下几个阶段（） A: Know（知）、Know how（知其然）、Know why（知其所以然）、Know what（知道是什么） B: Know（知）、Know how（知其然）、Know what（知道是什么）、Know why（知其所以然） C: Know（知）、Know what（知道是什么）、Know how（知其然）、Know why（知其所以然） D: Know what（知道是什么）、Know（知）、Know how（知其然）、Know why（知其所以然）

The speaker experienced a(n) ________ moment when someone interrupted him and challenged him because he did not know how to answer the questions.

 It __ long before we __ the result of the experiment.[br][/br][br][/br] A: will not be; will know B: is; will know C: will not be; know D: is; know

13 A: They know how to adapt. B: They know when to stop. C: They know when to make compromises. D: They know how to control their emotion.

I would ask her to a movie, but I _________ her name. A: don't know B: know C: hadn't know D: will know

If you know the ( )of something, you know all the

I know one thing: that I know __________.

Little ________about Lucy. A: Do he know B: he know C: does he know