再生障碍性贫血的诊断标准是()
A.全血细胞减少
B.网织红细胞减低
C.中性粒细胞碱性磷酸酶活性升高
D.无肝脾肿大
E.上述都是
参考答案:E
Mary is going _____ December, and she's staying _____ three weeks. [ ]
A. on; for
B. in; for
C. at; in
D. in; on
高压蒸汽灭菌时,包裹不应过大,应小于
A.33 cm×22 cm×15 cm
B.55 cm×22 cm×15 cm
C.55 cm×33 cm×15 cm
D.55 cm×33 cm×22 cm
E.55 cm×30 cm×20 cm