A:4月29日深、沪市开盘后仅维持了半小时的微弱反弹,就开始掉头向下,一路盘跌。个股更是哀鸿遍野,加速急跌的个股数量在不断增加。
B:今年的全明星周末对于姚明这样已经二进宫的球星来说,少了许多的新鲜和刺激。
C:我只是做了一点能让我心安的事,没想到能得到这么多的不虞之誉.这让我感到十分不好意思。
D:从奥运会开幕式看来,张艺谋实在太钟爱那些所谓传统文化的符号了。而且,他的运用是非常具象的、一成不变的。如果他不那么胶柱鼓瑟,开幕式会不会更好一点?
①H2SO4(aq)+2NaOH(aq)=Na2SO4(aq)+2H2O(l)
②H2SO4(aq)+Ba(OH)2(aq)=BaSO4(aq)+2H2O(l)
③NH3•H2O(aq)+HCl=NH4Cl(aq)+H2O(l)
④NH3•H2O(aq)+CH3COOH(aq)=CH3COONH4(aq)+H2O(l)
其中反应热为57.3kJ/mol的是( )
判断下列句子是否正确,正确的写“正确”,错误的写“错误”
The school library opening time is from 8: 00 to 16: 00. Students must remember (记住)that they must not bring food and drinks into the library. They can take out six books every time. And they can only keep them for one week. If they don't give back the books on time, they'll have to pay(支付) some money. Students must take care of all the books. But some books are only for teachers.
食醋是厨房中的一种调味品,其中含有少量醋酸 。下列有关醋酸的说法不正确的是()