下列各组中的两物质作用时,反应条件或反应物用量的改变,对生成

下列各组中的两物质作用时,反应条件或反应物用量的改变,对生成物没有影响的是(   ANa2O2CO2   BNaO2        CNaOHCO2        DCO2

答案

A

相关题目

弹冠相庆:指官场中一人当了官或升了官,同伙就互相庆贺
弹冠相庆:指官场中一人当了官或升了官,同伙就互相庆贺将有官可做。 义愤填膺:发于正义的愤懑充满胸中。 炙手可热:比喻权势大,气焰盛,使人
 From the top of Mount Tai, you can get a wonderful        of sunrise.
 From the top of Mount Tai, you can get a wonderful        of sunrise.        A. scenery          B. sightseeing        C. view             D. scene
Look! The black clouds are gathering, which _____ that it will rain soon. A. in
Look! The black clouds are gathering, which _____ that it will rain soon. A. indicates   B. explodes     C. claims      D. thinks
两列振幅、波长和波速都相同的简谐波a和b分别沿x轴的正方
两列振幅、波长和波速都相同的简谐波a和b分别沿x轴的正方向、负方向传播波速v=200m/s,在t=0时刻的部分波形如图所示,那么在x轴上x=450m的质点P,
南宋吴自牧的《梦梁录》记载“风雨其晦时,惟凭针盘而行
南宋吴自牧的《梦梁录》记载“风雨其晦时,惟凭针盘而行,乃火长掌之,毫厘不敢差误,盖一舟人命所系也。”“一舟人命所系也”的物件使欧洲  
甲、乙两物质的溶解度曲线如图所示。下列叙述中正确 的是(
甲、乙两物质的溶解度曲线如图所示。下列叙述中正确 的是(    )     A. t1℃时,甲和乙的饱和溶液的质量分数均是30%     B.甲的溶解度大于乙
 _______ hamburgers are junk food, many children like them. A. If      
 _______ hamburgers are junk food, many children like them. A. If                      B. Unless          C. Because        D. Although
The meeting was _____ at ten o’clock, but the chairman hadn’t turned up by e
The meeting was _____ at ten o’clock, but the chairman hadn’t turned up by eleven o’clock. A. start    B. have started       C. be starting  D. be started