— ____ you ____ to the park yesterday?
— Yes, I did. ( )
A:Do, go
B:Did, go
C:Did, went
⑴____ what when
⑵____ who where
⑶____ whose here
⑷____ white well
⑸____ walk why
⑹____ weather which
用Cl2生产某些含氯有机物时会产生副产物HCl.利用反应A,可实现氯的循环利用.反应A:
4HCl+O2 CuO/CuCl2 __ 400C∘ 2Cl2+2H2O
已知:ⅰ.反应A中,4mol HCl被氧化,放出115.6kJ的热量.
ⅱ.