科学研究、技术开发机构，在2010年1月1日前，在合理数量范围内进口国内不能生产或者性能不能满足需要的科技开发用品，免征进口关税和进口环节增值税、消费税。
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The author of the text mainly ______.
A. describes the activities of a law．breaker
B. suggests an ideal way to travel
C. argues against the air-courier travel
D. tells US about a developing business
What was the teacher’s requirement for the poster？
A. It must appear in time．
B. It must be done in class．
C. It must be done on a construction sheet．
D. It must include the words on the blackboard．
应征缓税利息=应征税额×计息期限×缓税利息率/360
A. 正确
B. 错误
What made Professor Broad continue his search for more information on McKay？
A uniform. of McKay．
B. A footnote about McKay．
C. A book on McKay．
D. A picture of McKay．
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