A:两种粒子,若核外电子排布完全相同,则其化学性质一定相同
B:凡单原子形成的离子,一定具有稀有气体元素原子的核外电子排布
C:由不同元素组成的含多个原子的分子里,一定只存在极性键
D:两原子若核外电子排布相同,则一定属于同种元素
园林工人在移栽秧苗时,要在阴天或傍晚进行,并时常剪去部分枝叶,其目的是降低( )
Tomorrow we will go to Hainan. It's warm there. We will have a special Chinese New Year's Day. Now let's get ready! We need three tickets from Shijiazhuang to Hainan. We don't need winter clothes. I want a beautiful dress. My parents take some T-shirts and shorts. We need to take milk, cakes and fruit. We need three hats. The sun is very hot there. We don't want to turn black. That's all done.
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