B淋巴细胞表面的特有受体是

A．膜表面免疫球蛋白
B．绵羊红细胞受体
C．C2受体
D．IgG Fe受体
E．结合肿瘤细胞的受体

We should always bear in mind that ______ decisions often result in serious consequences.

A．urgent

B．instant

C．prompt

D．hasty