A:标准状况下,2.24LH2O含有的分子数等于0.1NA
B:1 mol CaC2所含阴离子数为2NA
C:含有lmol Fe(OH)3的氢氧化铁胶体中胶粒数为NA
D:常温常压下,16gO2和O3的混合气体含有的氧原子数为NA
学数学不仅仅是听课和解题,三年初中数学学习期间,教材中给你留下深刻印象的选学内容(读一读)有____、____ 、____ (课题名称三个).
A train stops at a station(车站). A young man wants to come out, but it is raining. A boy is standing under a big umbrella. The young man says to the boy,"Can you go and get us two hamburgers, one for you and one for me? Here are two dollars. " "Great!"says the boy and he goes to buy hamburgers. After some time, the boy is back. He is eating a hamburger. "Where is my hamburger?"asks the young man. "Oh, there is only one hamburger left(剩下). So I'm eating mine. Here is your dollar. "
如果考试没考好,心情郁闷,下列调整自己情绪的方法错误的是( )