温差作用
参考答案:
温差作用是因气候变化而导致岩石产生崩解。
She made one or two remarks which suggested that the company _____in financial trouble.
A.is
B.be
C.was
D.should be
现代钢铁企业中,炼铁原料的供应系统,以()为界分为两部分。