A.put off
B.join in
C.hold on
D.take part in
请利用数据讨论CaO(s)+H2O(1)→Ca(OH)2(s)反应的方向性.
A.Heathcliff himself
B.Catherine
C.one's spiritual life
D.one's ghost
已知298K时,Ca(OH)2(s)的=-897.5kJ·mol-1,H2O(1)的=-237.1kJ·mol-1,= 1.00×10-7,试求电对Ca(OH)2/Ca的电极电势。
A、Good for you
B、Oh, I agree
C、That’s right
D、Just so-so
A.That’s too bad
B.Oh, he is careless
C.I’m sorry to hear that
D.He must be careful
A.Yes,I like basketball a lot
B.It‘s far too crowded
C.Yes,I’m crazy about it
D.Oh,it’s funny
A.What's the weather like
B.Is it big
C.What's your hometown like
D.Is the night life exciting
A.I came here by plan
B.Oh, I love it. It's so excitin
C.It's quite difficult to answer.
D.What do you think of it?
A.NaCl(aq)NaHCO3(s)Na2CO3(s)
B.CuCl2Cu(OH)2Cu
C.AlNaAlO2(aq)NaAlO2(s)
D.MgO(s)Mg(NO3)2(aq)Mg(s)