重钢双光棍破碎机辊子直径是1200mm,试用经验公式计算能破碎燃料的最大块度直径?
参考答案:
能破碎的最大块度直径=(1/19)*1200=63.16mm
It was quite a few years __________the accused was declared innocent and set free.
A.since
B.that
C.when
D.before
企业购买远期利率协议的目的是()。
A.锁定未来放款成本
B.锁定未来借款成本
C.减少货币头寸
D.对冲未来外汇风险