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问题 单项选择题

诊断再障的必备条件为

A．全血细胞减少
B．网织红细胞绝对值＜15×109/L
C．骨髓有核细胞增生低下
D．骨髓非造血细胞增多
E．骨髓巨核细胞数量明显减少

答案

参考答案：E

单项选择题 A1/A2型题

紫外线杀菌的机制在于（）

A.干扰细菌DNA的复制与转录

B.干扰细菌RNA的合成

C.破坏细菌的酶

D.增加细菌细胞壁通透性

E.使细胞蛋白质变性
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单项选择题

An analyst does research about Eurodollar futures. Which of the following statements is NOT accurate（）

A. Prices are quotedas 100 minus the rate priced into the contract.

B. The official Eurodollar rate is compiled by the British Bankers Association.

C. Contracts are paid off based on Euribor on a given day.
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