衢州市有许多风景名胜,下述自然景象属于生物群落的是( )
A:江山江郎山上的赤丹岩
B:衢州烂柯山中所有松树
C:开化古田山所有生物
D:龙游石窟中所有微生物
已知D为 ,F1和F2互为同分异构体,加成HBr时F1有两种加成产物,F2只有一种加成产物,G1和G2分别互为同分异构体.据此作答:
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注意事项:1. 电子邮件的开头和结尾已经写好。2. 词数不少于60词。
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老师是我们成长道路上的引路人,在与老师交往中,尊重老师是我们应有的道德品质。以下属于尊重老师的表现的是( )
-- _______ your mother like oranges?
-- Yes, she likes to eat ________ very much.