A:在1 L 0.2 mol·L-1的Na2CO3溶液中含有CO32—的数目为0.2NA
B:0.1 mol Fe参加氧化还原反应,转移的电子数目一定是0.3 NA
C:15.6 g Na2O2与过量CO2反应时,转移的电子数为0.2NA
D:1 mol Na2O2中含有的阴离子数目为2NA
关于“瓦肆”(也称“瓦子”)的说法,不正确的是( )
实物粒子和光都具有波粒二象性,下列事实中突出体现波动性的是( )
生物进化论的提出是生物科学的一次重大理论突破。取得这一巨大成就的是( )
根据短文内容,判断正误。符合短文内容,对的写正确,错的写错误。
Ann and Lucy visit the zoo today. They see many animals there. Look, a bear is under the tree. You can see two pandas near the river. Ann and Lucy like pandas very much. There are two tigers and four leopards at the zoo. Some foxes, rabbits and squirrels are behind the rocks. Six sheep and eight goats are on the ground. They are eating grass. Ann and Lucy like all the animals at the zoo. They have a good time today.