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1.There were lots of visitors standing in front of the ticke

来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:综合作业 时间:2024/07/09 13:38:05
1.There were lots of visitors standing in front of the ticket window.
这里为什么要用standing?前面不是were吗?
2.化学的原子结构图,记得高一高二时学的核外电子排布是2、8、8……
但是高三学了能级能层之后,就排布成了2、8、18、32……了.
为什么会这样呢?很迷糊.
1.There were lots of visitors standing in front of the ticke
standing in front of the ticket window.
是现在分词短语,修饰visitors,与时态无关.
还是2,8,8,后面紧跟的就是18……