Tom _________ Mary in 1998. That is to say, they _________ for 12 years.
A:got married with , have got married
B:got married to , have married
C:married, have been married
D:married to, have been married
60℃时,某同学在盛有硝酸钾饱和溶液的烧杯中,漂浮一个木块(如图),然后将溶液冷却到室温(20℃).请你说出观察到的两个现象,并运用你学过的化学知识和物理知识分别解释这些现象产生的原因.
2014年6月27日,国务院发布《社会信用体系建设规划纲要(2014——2020年)》,进一步完善了涉及信用征集、奖惩、黑名单等一系列制度,全方位提高失信成本,增强威慑力。这告诉我们( )
①信用社会,法制先行 ②对人守信,对事负责
③大事诚信,不拘小节 ④失信可耻,守信光荣
下列实验基本操作不正确的是( )