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。()
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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.
In the Maori language the word “Marae” means _______.
A. Maori culture
B. non-Maori or European
C. protocol
D. meeting house
In 1769, _______ visited New Zealand and claimed it for Britain.
Abel Tasman
B. James Cook
Christian missionaries
D. Sealers and whalers