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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

—We've spent too much money recently.
—Well, it isn't surprising. Our friends and relatives（）around all the time.

A. are coming

B. had come

C. were coming

D. have been coming
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单项选择题

唯物辩证法认为发展的实质是（）

A、事物的变化过程

B、事物由旧质转化为新质

C、事物的量变过程

D、事物的运动过程
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