都蛋白质的含量一般为（）
A. 20%～25%
B. 25%～35%
C. 35%～40%
D. 40%～45%
Have you heard of the legend of the round-table knights Which of the following kings are they connected with
A. Kind Alfred.
B. King Offa.
C. King Arthur.
D. King Edwar
Uncle Tom's Cabin is a novel depicting the life of ______ in Americ
A. Spanish peopleB. child laborsC. black peopleD. Chinese people
货币在表现和计量商品价值时执行的职责是（）。
A. 支付手段
B. 价值尺度
C. 流通手段
D. 价格标准
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