【单选题】小纸片会在发声的扬声器上跳动 , 树叶随风荡漾发出 “ 哗哗 ” 的响声,这些现象说明了 ( )
【单选题】The girl usually does her homework _____ it is very late at night .
【单选题】已知三个数3, ,21三数成等差数列,则 等于( )
【单选题】The girl usually has supper by herself ____her parents don't have to work overtime.
【单选题】已知3, ,21三个数成等差数列,则 =________
【单选题】The girl usually has supper buy herself___her parents don't have to work overtime.
【简答题】已知3,X,21三个数成等差数列,则X等于( )。
【单选题】已知 3 , , 21 三个数成等差数列,则 等于 ( )
【单选题】《罪与罚》中,拉斯柯尔尼科夫认为()是行动的精英。
【简答题】听下面一段对话,回答第1小题。 1. How long does the girl usually spend on her homework? A. For half an hour B. For about two hours. C. For about three hours.