a仪器的名称是____;实验室利用甲装置制取氧气时,a仪器中所盛试剂为____(填名称).实验结束时,为防止水倒吸,正确的操作是:先____,再____.用装置乙制取二氧化碳,反应的化学方程式为____,实验时,如果二氧化碳始终收集不满,可能的原因是____(写一种).
A: What's the matter with you, young man?B: Oh, doctor. I'm not feeling well. ____ I think I will die.A: Die? I don't think so. Take it easy.(放轻松)____ B: Ahh... I must have a terrible illness.A: Em...____ I am sure you will be all right soon.B: But I really feel very terrible. What should I do now?A: ____ B: Is that all?A: You should drink more water and you shouldn't eat spicy(辣的)food.B:____ A: No, you needn't
设a,b为实数,若1+2ia+bi=1+i,则|a+bi|=( )
温度/℃
0
20
40
60
80
溶解度/g
13.3
31.6
63.9
110
169
则下列说法正确的是( )
①挖掘中国文化的亮点,展示中华文化魅力
②发挥大众传媒作用,消除民族文化间隔阂
③遵循文化共性和普遍规律,搭建沟通桥梁
④积极吸纳当地文化元素,增强文化认同感