钢筋原材料进场检验项目中,预应力钢丝的检验项目有()。
A.外观检查
B.拉力、反复弯曲试验
C.重量测定
D.冷弯试验
E.化学成分测定
参考答案:A, B
The days _______ we spent together on the farm are not easy _________.
A.when, to forget
B.which, to be forgotten
C.that, to forget
D./, to be forgotten
用这两种证券组合成的无风险投资组合的收益率将为:
A.8.5%
B.9.0%
C.8.9%
D.9.9%