自身免疫性溶血性贫血病人输血应首选（）
A.浓缩红细胞
B.洗涤红细胞
C.少白细胞的红细胞
D.冷冻红细胞
E.照射红细胞
参考答案：B
—I’m sorry, but the manager isn’t here yet. Shall I have him call you when he comes back?
—No, I’ll call him later. If I call again in half an hour, do you think he ?
A．arrives
B．has arrived
C．will arrive
D．will have arrived
卫生城市的称号是永久性的吗？
