在大地四边形中,观测角应该满足的角度条件可以列出我个,但其中独立的条件只有三个,通常取一个四边形内角和条件和两个对顶角条件。
参考答案：对
The 1930s were the year when he wrote one _____ after another, and when his first
collection of _____ was published.
A．poem, poetry
B．poetry, poem
C．poem, poem
D．poetry, poetry
熟料的石灰饱和系数与硅率、铝率的关系是互不影响的。
