维生素A缺乏的最早症状是()。
A.黏膜上皮细胞的角化
B.Bitot斑
C.暗适应能力下降
D.干眼病
E.夜盲症
参考答案:C
把下面的成语补充完整。
( )( )处优 语( )心( ) 座无( )席
( )( )深长 ( )风( )雨 惊心动( )
目不( )( ) ( )有兴味 ( )想不到
The crowd cheered wildly at the sight of Liu Xiang,who was reported _______ the world record in the 110-meter hurdle race.
A.breaking
B.having broken
C.to have broken
D.to break