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

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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.

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……

1.There were lots of visitors standing in front of the ticke man standing in front of the window My desk is in front of the window and there are lots of plan The Greens ( ) standing in front of the class There were lots of snacks in the past.同义句 There _ _ _ a lot There were lots of fish in the river years ago.yes but there Standing In Front Of You 歌词 Are there cats in front of the there are lots of -in the store there are lots of 【】 in the shop there are lots of () in the school. there were a car in front of the house just now 一般疑问句.