什么是洋盆?
参考答案:
面积巨大而形状多少具有一些盆状的洼地称为洋(海)盆。
Be quick! The TV play _____ for ten minutes. [ ]
A. has begun
B. has started
C. has been on
D. was started
98K时,反应A(g)+B(g)2C(g)+D(g)的,若A、B、C、D的起始压分别为100kPa、200kPa、33.5kPa、67kPa,则298K时反应()。
A.正向自发
B.逆向自发
C.处于平衡态
D.不能确定