标准的气象地面观测场的面积为()米2,如确因条件限制也可适当按比例缩小,但不应当小于()米2。
参考答案:25×25;16×16
After 5 days of fantastic space trip ,the two astronauts walked out of the spaceship, ______.
A.tired and happy
B.tired but happy
C.tiredly and happily
D.tiredly but happily
How long do you think the meeting will be lasted