用数字给下列句子排序
____ One for you and one for me.
____Yes, I like sweets very much.
____ Hi, Alice! Do you like sweets?
____Thank you.
如图是钠元素和氯元素在元素周期表中的信息和有关的4种粒子结构示意图.下列说法正确的是( )
— No. It be her. She left for Shanghai yesterday.
在3,﹣2,0,﹣1.5中,属于负整数的是( )
下面用数学语言叙述代数式1a﹣b,其中表达正确的是( )