Although at the age of 30 and much older than the other players, Zhang Ning __________ to win the gold medal in the final match.
A:hung up
B:hung on
C:hung about
D:hung out
根据空气的成分填空:
(1)小白鼠在装有空气的密闭容器中可存活一段时间,说明空气中含有____ ;
(2)石灰水长期露置在空气中会出现白色固体物质,说明空气中含有____ ;
(3)夏天,盛放冰棒的杯子外壁上附有一层水珠,说明空气中含有____ ;
(4)灯泡中充入____ 时能发出不同颜色的光,制成多种用途的光源.
I'm ________ years old and it's my _______ birthday today.