No. 6: What can we learn about endorphins and Internet addicts from the text?
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No. 7: When should we take a step back from the Internet?
A
B
C
D
No. 8: What is the author's main purpose in writing the text?
A
B
C
D
JavaScript的代码既可以写在标签之间，也能写在标签之间。
A. 对
B. 错
写 "Hello World" 的正确 Javascript 语法是：document.log("Hello World")
A. 对
B. 错
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