He has never been to London before,______he knows everything about the people and the customs there.
A. and
B. but
C. for
D. so
查看答案
______his speech than a young woman stood up to ask a question.
A. Scarcely the chairman finished
B. No sooner had the chairman finished
C. Scarcely did the chairman finish
D. No sooner did the chairman finish
______started mowing the lawn when it began raining.
A. No sooner I had
B. No sooner had I
C. Hardly I had
D. Hardly had I
假设P为债券价格，F为面值，C为票面收益，r为到期收益率，n是债券期限，如果按年复利计算，零息债券到期收益率为()。
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