I know you're busy these days, but you'd better ___________ off today's work till tomorrow.
A:not to put
B:not putting
C:not put
D:don't put
20世纪90年代以来,实施____的发展战略,明确提出____。
CH4(g)+2O2(g)⇌2H2O(l)+CO2(g)△H=﹣890kJ•mol﹣1
2CO(g)+O2(g)⇌2CO2(g)△H=﹣566kJ•mol﹣1
如果有CH4和CO的混合气体充分燃烧,放出的热量为262.9kJ,生成的CO2用过量的饱和石灰水完全吸收,可得到50g白色沉淀.则混合气体中CH4和CO的体积比为( )
U甲:U乙=1:3;断开开关 S ,拆去电压表,并在甲、乙两处分别接入电流表,此时I甲:I乙是( )