题目

The new law states that people _______drive after drinking alcohol. A . wouldn't B . needn't C . won't D . mustn't 答案：D下列各组微粒中氧化性由弱到强，且半径由大到小的是（   ）A．O、Cl、S、PB．K+、Mg2+、Al3+、H+C．Al3+、Mg2+、Ca2+、Ba2+D．I-、Br-、Cl-、F-