题目内容

What are the steps performed by an OS to create a new process?

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What is the difference between an interrupt and a trap?

Give three examples of an interrupt.

乙酸乙酯的制备实验中①乙酸、②乙醇、③浓硫酸的加入顺序应该是？

A. ②③①
B. ①②③
C. ③②①
D. ②①③

制备乙酸乙酯时浓硫酸的作用是？

A. 氧化剂
B. 催化剂
C. 吸水剂
D. 脱水剂