第15题: [单项选择]淋巴细胞不表达 A. CD2分子 B. MHC-Ⅰ抗原 C. MHC-Ⅱ抗原 D. 补体受体 E. Fc受体 参考答案:A 答案解析:B淋巴细胞表达MHC Ⅰ类和Ⅱ类抗原、抗原特异识别受体、Fc受体、补体受体、细胞因子受体、有丝分裂原受体和CD19、CD20、CD40、CD80、CD86等分子,但不表达CD2分子。
第33题: [单项选择]According to the passage, the main reason why young people should be discouraged from becoming actors is ______. A. actors are very unusual people B. the course at the drama school lasts two years C. acting is really a hard job D. there are already too many actors 参考答案:D 答案解析:[解析] 细节推理题。短文第一句话就谈到了这一点:Acting is such an over-crowded profession that the only advice that should