第9题: [单项选择]Why are American bills or paper money unlike that in many other countries A. They are all silver colored. B. They are not all silver colored. C. The one-cent piece is silver colored. 参考答案:B
第30题: [单项选择]The news that the examination would be held two weeks earlier caused quite a ______ among the students. A. fluctuation B. torrent C. flutter D. degradation 参考答案:C 答案解析:flutter恐慌,不安。 fluctuation波动,起伏。torrent激流,山洪。degradation降落,堕落。所以C选顶正确。
第32题: [单项选择]溶血空斑形成试验中,每一个空斑表示 A. 一种抗体 B. 一种抗体形成细胞 C. 一种细胞 D. 一个细胞 E. 一个抗体形成细胞 参考答案:E 答案解析:溶血空斑是受绵羊红细胞(SR-BC)免疫的鼠脾细胞内的抗体生成细胞释放的抗SRBC抗体,在补体的介导下使其周围的SRBC溶血。一个空斑表示一个抗体形成细胞。