题目

Time was passing and we were getting       because we would have to spend the night in the cave if no one came to the rescue.        A. awkward    B. blank   C. desperate    D. breathless 答案：C 单克隆抗体是指 [　　] A． 单个骨髓瘤细胞增殖产生的抗体 B． 单个B淋巴细胞增殖产生的抗体 C． 单个T淋巴细胞产生的抗体 D． 单个杂交瘤细胞培养产生的抗体