A:向等质量的锌粉和铁粉中加入过量的稀硫酸
B:向一定量KNO3的不饱和溶液中不断加入KNO3固体
C:等质量的镁和氧气在点燃条件下充分反应
D:过氧化氢溶液与二氧化锰混合
Hello, I'm Jack. I live in a house. My address is 246 Second Street. It's far from the school. So I go to school by bus every day. But my house is near the park. So I often go to the park on foot. Tom is my friend. He lives in a house, too. It is near the school. So he goes to school on foot every day.
在里约奥运会女子乒乓球团体决赛中,中国队在李晓霞的率领下直落三盘战胜德国队,实现了三连冠。赛后李晓霞说:“获得团体金牌是大家共同努力的结果,是因为我们相互信任”。李晓霞的话揭示的道理有( )
①集体利益是集体中每个成员共同努力的结果 ②只有团结的集体才能发挥强大的凝聚力和战斗力
③只有将个人利益放弃,才能实现共同利益 ④集体利益和个体利益是相互依存的
下列句子中没有错别字的一项是( )