对寄生虫感染发生应答,并在过敏反应中起反馈调节作用的是()
A.内皮细胞
B.嗜酸性粒细胞
C.血小板
D.中性粒细胞
E.嗜碱性粒细胞
参考答案:B
著名作家丁玲的作品是[ ]
A.《小二黑结婚》
B.《红旗谱》
C.《暴风骤雨》
D.《太阳照在桑干河》
They were surrounded by the enemy, but they________at last from the village. [ ]
A. managed escaping
B. tried to escape
C. managed to escape
D. tried escaping