第3题: [单项选择]I______ this book in a secondhand bookstore on Nanjing Road. A. came into B. came about C. came round D. came across 参考答案:D 答案解析:come into进入……状态。come about发生,产生。come round顺便来访。而come across碰到,找到,尤指意外地或偶然地碰到,符合题意。
第34题: [单项选择]关于出生后造血,错误的是 A. 淋巴器官产生淋巴细胞 B. 出生后红细胞、白细胞、血小板均由骨髓产生 C. 5~7岁以下幼儿几乎全部骨髓参与造血活动即为红髓 D. 长骨骨髓腔为脂肪细胞所代替称为黄髓,即失去造血功能 E. 正常情况下,成人主要的造血器官是骨髓 参考答案:C 答案解析:5岁以下幼儿几乎全部骨髓参与造血活动即为红髓。
第35题: [单项选择]I don’’t think it advisable that Tom_________ to the job since he has no experience. A. be assigned B. is assigned C. will be assigned D. has been assigned 参考答案:A 答案解析:“it advisable that……”从句虚拟语气“should do” should可省略。