脾脏大平脐，骨髓增生极度活跃 （）
A.急性白血病
B.慢性粒细胞白血病
C.再生障碍性贫血
D.特发性血小板减少性紫癜
E.淋巴瘤
参考答案：B
含去甲肾上腺素的神经元胞体主要位于
A.脊髓前角
B.低位脑干
C.黑质、脚间核
D.中缝核
E.纹状体
They _____ on the little professor, but it led to his fierce criticism on us. [ ]
A. played a joke
B. made fun
C. had fun
D. performed a joke
