有不锈钢外罩的聚四氟乙烯坩埚可以在低于200℃下加压加热分解试样。 ( )
参考答案:对
Which of the following is/are sources of return on a collateralized commodity futures position()Ⅰ. Collateral yield Ⅱ. Change in the spot price of the commodity Ⅲ. Roll yield
A. Ⅰ, Ⅱ and Ⅲ.
B. Ⅱ and Ⅲ only.
C. Ⅰ and Ⅲ only.
以下关于骨伤科用药说法错误的是()
A.孕妇忌用或慎用
B.用药后皮肤过敏时应立即停止使用,严重者去医院就诊
C.软组织扭挫伤、颈肩痛、腰腿痛都属于骨伤科用药
D.为外用药