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【简答题】
简述计算机网络故障检测的主要命令。
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反馈参考答案：
举一反三
【单选题】We are told everywhere. It's our duty to keep our school clean and tidy. [ ]
A.
not to make much noise
B.
to throw waster paper
C.
to draw
D.
not to spit
【简答题】List one of the differences between false pretences and unfeigned messages, according to Hancock's study.
【单选题】In class, Miss Zhang is really __ about our study. But after class, she always tries many ways to make our school life not so boring.
A.
serious
B.
hard-working
C.
surprised
【简答题】List the Following acids in order of acid strength in aqueous solution: (a)HClO 4 H 3 AsO 3 H 2 SiO 3 H 2 SO 4 (b)HClO HClO 4 HClO 2 HClO 3
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