下列叙述不正确的是( )
A:若aXm+ 和bYn-两种离子电子层结构相同,则a-b=n-m
B:24Mg32S晶体中电子总数与中子总数之比为1︰1
C:CO2和PCl3分子中各原子最外层都满足8电子结构
D:ⅥA族元素的氢化物中,稳定性最好的其沸点也最高
某草原生态系统中各成分之间的关系如图所示.请回答:
根据短文内容填空。
Jane White is an American girl. She is fifteen. She is a middle school student. Her father is Bill White and her mother is Joan White. Her brother, Bob, is a student, too. He is in a black coat and Jane is in a red sweater.
People will three days a week in the future.
下列过程不需要受体参与的是( )