根据句意及首字母提示,填写单词(1)I’d like to have two apple p____ .(2) Boys, stop t____ stones at the poor dog.(3)The dish Mom cooked p____ a nice smell.(4)One c____ means a hundred years.(5) In a____ times, it was hard for people to travel around.
计算。
3×4+3=____ 5×5-15=____ 3×3+20=____
哈密地区白山钼矿发现新矿源,是新疆目前发现的最大钼矿,钼是稀有矿产资源,主要用于航天合金材料制作。在元素周期表中钼元素的某些信息如图所示。下列有关钼的说法正确的是()