再生障碍性贫血诊断的主要依据是：
A．B超
B．CT检查
C．磁共振成像(MRI)
D．骨髓检查
E．同位素骨扫描
参考答案：D
一般眼膏
A．油脂性基质B．水溶性基质C．栓剂基质D．乳化剂E．气雾剂的抛射剂
Many students believe the choice of their courses and universities should _____their own interest. [ ]
A. be based on
B. base on
C. basing on
D. base at
