第5题: [单项选择]吞噬细胞主要包括() A. NK细胞和单核-巨噬细胞 B. 单核-巨噬细胞和中性粒细胞 C. 中性粒细胞和树突状细胞 D. NK细胞和中性粒细胞 E. 中性粒细胞和APC 参考答案:B 答案解析:体内具有吞噬功能的细胞群称为吞噬细胞,一类为大吞噬细胞,即单核-巨噬细胞;另一类为小吞噬细胞,即中性粒细胞。
A. They were arrested by police. B. They could not take their flights as planned. C. They were delayed because of desperate weather. D. They were forced to go hom 参考答案:B 答案解析:[听力原文]26-28 Chaos segued into fatigue and frustration at Heathrow Airport on Saturday as thou