【简答题】下列四种电子构型的原子中(n=2、3、4)第一电离能最低的是( )。 (A) ns 2 np 3 (B) ns 2 np 4 (C) ns 2 np 5 (D) ns 2 np 6
【判断题】If you are really tired , you can stop having a rest for 10 minutes.
【简答题】If you are really tired, you can stop______ (have) a rest for 10 minutes.
【简答题】If you are really committed to sustainable farming, Kahang is a great place to .
【单选题】用辩证唯物主义认识论考察艺术,就会发现作为意识形态的艺术是( )在艺术家头脑中反映的产物。
【判断题】Games should always be included in grammar lessons.
【单选题】'No, thanks, I don't smoke.' If you are really addicted to smoking and want to【C1】______, that may be the hardest thing you ever have to say. 'I don't smoke' has become an attitude of【C2】______ there ...