第3题: [单项选择]
良性黏膜类天疱疮的主要病理变化之一是 A. 天疱疮细胞 B. 棘层内袍 C. 基层下疱 D. 棘层萎缩变薄 E. 固有层淋巴细胞浸润带 参考答案:C
第4题: [单项选择]According to Krom, the Egypt's old Kingdom fell______. A. immediately after a period of drought. B. immediately after a period of flood. C. just before a drought struck. D. just before a flood struck. 参考答案:A 答案解析:第五段有这么一个句子:…one of these periods…immediately came before the fall of the Egypt’s Old Kingdom.其中的一个时期