缺铁性贫血最可靠的诊断依据是（）A．网织红细胞减少 B．MCV降

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问题单项选择题 A1型题

缺铁性贫血最可靠的诊断依据是（）

A．网织红细胞减少

B．MCV降低

C．骨髓中铁粒幼红细胞减少

D．血清铁降低

E．骨髓象和红细胞系增生低下

答案

参考答案：D

解答题

已知命题p：函数f（x）=log_a|x|在区间（0，+∞）上单调递增，命题q：关于x的方程x²+2x+log_a23=0的解集只有一个子集，若“p或q”为真，“￢p或￢q”也为真，求实数a的取值范围．

仿写题

例1: cauliflowers	— What are these / those? — They're cauliflowers.
1. cucumbers	— _______________________________? — _______________________________.
例2: dogs	— Are these / those dogs? — Yes, they are.
2. mushrooms	— _______________________________? — _______________________________.
例3: girls / boys	— Are these / those girls? — No, they aren't
3. onions / cabbages	— _______________________________? — _______________________________.