1，3顺式维甲酸诱导分化治疗在哪些癌症有一定作用()
A．慢性粒细胞白血病
B．肺癌
C．膀胱癌
D．皮肤T细胞淋巴瘤
E．皮肤癌
参考答案：D, E
关于灭菌和消毒的理解不正确的是[ ]
A．灭菌是指杀灭环境中一切微生物的细胞、芽孢和孢子
B．消毒和灭菌实质上是相同的
C．接种环用灼烧法灭菌
D．常用灭菌方法有灼烧灭菌、干热灭菌、高压蒸汽灭菌等
Not until ___to do my homework ____ how much time I had wasted playing computer games.
A．I began; I realized
B．I began; did I realize
C．did I begin; I realized
D．did I begin; did I realize
