工厂蒸汽压力等级有()。
A、常压和高压
B、低压、常压和高压
C、低压和高压
D、低压、高压和过热
参考答案:D
An analyst forecasts that spot interest rates will increase more than the increase implied by the current forward interest rates. Under these circumstances:()
A. the analyst should establish a bearish bond portfolio.
B. all bond positions earn the same return.
C. the analyst should establish a bullish bond portfolio.
施工技术交底是某一单位工程开工前,或一个分项工程施工前进行的技术性交代,其目的是使施工人员对工程特点、技术质量要求、施工方法与措施和安全等方面有一个较详细的了解,以便于科学的组织施工,避免事故的发生。