阅读以下信用证,做选择填空。
1.信用证内容:
2.根据信用证内容选择正确答案,并将答案填入括号内:
商业发票()份并须签署。
A.1
B.2
C.3
参考答案:C
—Mrs. King, could you tell me when we ______ a field trip?
—We'll have it when all the work ______.[ ]
A. are having; will finish
B. will have; finishes
C. will have; is finished
D. have had; will be finished
对支撑剂性能要求叙述错误的是()。
A.强度大、分选好、圆球度好
B.粒径较大、机械杂质含量少好
C.密度大、硬度大的支撑能力大好
D.来源广、价格低好