A:二氧化硅不与任何酸反应,可用石英制造耐酸容器
B:常温下浓硫酸能使铝发生钝化,可在常温下用铝制贮藏贮运浓硫酸
C:二氧化氯具有还原性,可用于自来水的杀菌消毒
D:铜的金属活泼性比铁的差,可在海轮外壳上装若干铜块以减缓其腐蚀
____ (talk) with your parents often is a good way to make them understand you.
下列哪种措施不利于维持生态系统的稳定性( )
选择合适的短语填空。
give concerts,dance music,all over Europe,the capital city of,in the eighteenth century