升国旗、唱国歌是爱国主义教育的重要内容。确定《义勇军进行曲》为新中国代国歌的会议是A.开国大典 B.中央人民政府委员会第
下列化学方程式与事实相符的是 ( ) A.用胃舒乳[Mg(OH)2]治疗胃酸过多:Mg(OH)2 + H2 SO4 =
《现代汉语词典》1978年第1版收录“个体经济、集体经济、小农经济、小商品经济、计划经济、商品经济”,至1996年第3版增加收录的有“市场经济、国
下列各数中,能使不等式 成立的是( ) A. 6 B. 5 C. 4 D. 2
两个烧杯中装有等质量的金属锌和镁,然后分别逐渐加入同浓度的稀硫酸,产生氢气的质量与加入硫酸的质量关系如图所示.下列说法正确的是( ) A
下列四个叙述,哪一个是正确的( ) A.3x表示3+x B.x2表示x+x C.3x2表示3x•3x D.3x+5表示x+x+x+5
It was a dark and cold night. The car driver didn’t have even one passenger all day. When he went by the railway station, he saw a young man coming out with two bags in his hands. So he quickly op
He has no ideas of his own, so he always his friends about everything. A. plays with B. argues with C. agrees with D. help