题目：
| 完形填空。 | ||||
| Jimmy is very 1 at math. Mary, his sister, doesn't do well 2 it. Jimmy often helps her with her math. One night, Jimmy and Mary take out their exercise books and begin 3 their homework. Soon Jimmy finishes 4 his homework, but his sister 5 . She can't work 6 the last problem. "Let me 7 you. says Jimmy. "No, please 8 . I'll do it myself. ", says Mary. She thinks and thinks, and an hour later she 9 it out. She is very tired, but she is very 10 . | ||||
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答案：
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参考答案：单核巨噬细胞的生物学功能：(1)能够有效地吞噬和清除病原微生物。(2)能够有效地加工和处理抗原，启动适应性免疫应答。(3)能够介导并促进炎症反应。(4)在免疫调节中发挥重要作用。(5)单核吞噬细胞对肿瘤...
