辨字组词。
宣( )喧( ) 撤( )澈( )
榜( )磅( ) 绕( )饶( )
例( )列( )
宣布 喧闹 撤离 清澈
榜样 磅秤 缠绕 富饶
例子 排列
(答案不唯一)
-Mr. Harry, we want to hear what you think about the reform being carried out in our school.
-OK, I ___ to that.
A.am coming
B.have come
C.came
D.come
设当x>0时,f(x)存在一阶连续导数,且f’+(0)存在,并设对于半空间x>0内的任意光滑封闭曲面∑,恒有
求f(x).