根据下列短周期元素性质的数据判断,下列说法正确的是 ①②③④⑤[⑥⑦⑧ 原子半径/10-10 m0.661.361.231.100.991.540.701.18 最高正化合价 +2+1+5+7+1+5+3 负化合价-2 -3-1 -3 A.元素①⑧形成的化合物具有两性 B.元素⑦位于第二周期Ⅴ族 C.元素④⑤形成的化合物是离子化合物 D.元素⑥的最高价氧化物对应水化物碱性最强How soon will you start your journey?I’m not sure. I haven’t decided ______A.when shall I ask the boss for leaveB.where I will go to spend the holidayC.wether I would go by train or by planeD.who could invite me to go