— The weather report says we are expecting another big snow storm tomorrow.
—________ . I planned to go mountain climbing with my classmates.
A:I hope so
B:Bad luck
C:Sounds good
D:I'm afraid so
见渔人,乃大惊,问所从来。具答之。便要还家。设酒杀鸡作食。村中闻有此人,咸来问讯。
水、土是立国之本,我国水土资源的分布情况是()
用元素符号或化学式填空:
(1)3个氮分子 ____
(2)4个硫离子 ____
(3)n个铜原子 ____
(4)正五价的磷元素 ____