新鲜冰冻血浆保存1年后，Ⅷ因子下降多少（）。
A.95%
B.85%
C.75%
D.65%
E.55%
参考答案：D
论述煤样的包装。
The first dictionary for students of English as a foreign language （）,into which the classification of sentence patterns was incorporated, was published in 1953.
A. Guide to Patterns and Usage in English
B. The Advanced Learner's Dictionary of Current English
C. A Handbook of English Grammar
D. Longman Dictionary of Contemporary English
