根据《UCP500》，信用证金额、单价、数量前如有“about”、“cir_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

根据《UCP500》，信用证金额、单价、数量前如有“about”、“circa”或类似意义字样者，所容许的差额不超过( )。

A．5％

B．8％

C．3％

D．10％

答案

参考答案：D

计算题

某雷达工作时，发射电磁波的波长λ=20 cm，每秒脉冲数n=5 000，每个脉冲持续时间t=0.2μs，问电磁波的振荡频率为多少？最大的侦察距离是多少？

填空题

根据句意，从方框内选择合适的短语并用其适当形式完成句子。

for example, hand in, in a way, ask for, depend on

1. Bob, you are quite right __________.
2. Taylor came to__________ my advice on his studies.
3. I hope you will all __________ your homework on time.
4. How much you can achieve ____________ how hard you have worked.
5. There are many universities in Beijing, __________, Beijing University,
Qinghua University and Beijing Institute of Foreign Languages.