鳞状上皮细胞癌町用: A.氟尿嘧啶 B.博来霉素 C.环已亚硝脲 D.羟基脲 E.环 发布时间:2022-01-05 20:47 │ 来源:www.tikuol.com 题型:单项选择题 问题: 鳞状上皮细胞癌町用:A.氟尿嘧啶B.博来霉素C.环已亚硝脲D.羟基脲E.环磷酰胺
题型:单项选择题 图5-59所示为一阶梯状圆轴,AC及DB段的直径为d1=100mm,CD段的直径为d2=1.20mm,P=20kN。已知材料的许用应力[σ]=65MPa,则此轴强度计算的结果是()。A.σmax=59.0MPa<[σ]B.σmax=101.8MPa>[σ]C.σmax=35.4MPa<[σ]D.σmax=61.1MPa<[σ] 查看答案
题型:单项选择题 —Why are you late for school?—______ I got up late this morning. [ ]A. Since B. As C. For D. Because 查看答案