苯分子中去掉一个氢原子剩余的基团称为苯基,又称苄基。()
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芳香族化合物的结构中一定含有苯环。( )
A. 对
B. 错
当苯环上连有吸电子基(硝基、磺酸基等)时,傅-克烷基化反应不能进行。()
A. 对
B. 错
碳原子的杂化轨道都形成s键,未参与杂化的P轨道都形成p键。()
A. 对
B. 错
Which of the following is true about the private schools in New Zealand?
A. They provide distance education.
B. They mainly admit students with special educational and developmental difficulties.
C. They are often not co-educational.
D. They mainly teach religious courses.