They __________ to the countryside and __________ many farms there.
A:go; saw
B:went;see
C:went, saw
D:going; seeing
由杨桃萌发直接长成的桃树,所结出的桃子叫毛桃.毛桃个小味差.桃树种植户将一段水蜜桃的枝条作为接穗嫁接到毛桃的砧木上,结果是( )
圆中最长的弦是____ .
1804年,拿破仑加冕称帝,在法国实行( )