问题
单项选择题
检测细胞表面CD抗原可帮助哪一类肿瘤组织分型
A．消化道肿瘤
B．卵巢肿瘤
C．呼吸道肿瘤
D．淋巴瘤
E．乳腺肿瘤
答案
参考答案：D
解析：对淋巴瘤和白血病细胞表面 CD分子的检测已用于其疾病诊断和组织分型。
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检测细胞表面CD抗原可帮助哪一类肿瘤组织分型
A．消化道肿瘤
B．卵巢肿瘤
C．呼吸道肿瘤
D．淋巴瘤
E．乳腺肿瘤
参考答案：D
解析：对淋巴瘤和白血病细胞表面 CD分子的检测已用于其疾病诊断和组织分型。
| Based on the following information to answer questions from 39 to 40: A mortgage-backed security has been divided into three classes or tranches as follows: Tranche Ⅰ receives net interest and all the principal payments until it is completely paid off. Tranche Ⅱ receives its share of net interest and starts receiving all the principal repayments after Tranche Ⅰ has been completely paid off. Prior to that, it only receives interest payments. Tranche Ⅲ receives monthly net interest and starts receiving all principal repayments after Tranches Ⅰ and Ⅱ have been completely paid off. Prior to that, it only receives interest payments. |
For a relatively small decline in mortgage interest rates, which of the tranches has the least amount of prepayment risk（）
A. Tranche Ⅲ.
B. Tranche Ⅰ.
C. Tranche Ⅱ.