题型:判断题 (2014·苏锡常镇四市调研)—As a teenager,our son should have two or three hobbies to be really happy.—________,but how can he afford the time with so much homework every day?A.So does heB.So he doesC.So should he D.So he should 查看答案
题型:判断题 最外层有1个电子的主族元素X与最外层有7个电子的另一主族元素Y化合,以下有关描述正确的是 [ ]A.X与Y一定能形成XY型离子化合物B.在XY中X的原子半径一定比Y的原子半径大C.电解XY时,阳极一定析出Y的单质D.生成的化合物一定易溶于水 查看答案