A:had been found
B:was found
C:has been found
D:would be found
已知关于x的方程3a﹣x=x2+3的解为2,则代数式a2﹣2a+1的值是____.
下图表示果实形成的简略过程,图中①、②、③、④分别表示( )
根据短文内容判断下列说法的正误。
There are four seasons in a year.They are spring,summer,autumn and winter.Spring is green with flowers.I can plant trees in spring.Summer is hot.I can swim in the sea.In autumn,farmers are busy.I can eat moon cakes and pick apples in autumn.But I like winter best.Winter is cold.Sometimes it snows.I often skate in winter.Sometimes l make a snowman.
摄氏温标规定:在通常情况下把 ____的温度规定为0摄氏度,把 ____的温度规定为100摄氏度.