直肠癌noses手术1到6式

逄径服1001顺铂[化学名称为顺二氯二氨合铂(II),化学式为PtCl2(NH3)2]是一种治疗癌症的药物,一片顺铂药片所含顺铂的质量为3*10^ - 4g.求:1.一片顺铂药片中顺... -
鬱贺璧19178905335 ______[答案] PtCl2(NH3)2 的摩尔质量 = 195 + 35.5 *2 + 17*2 = 300 g/mol PtCl2(NH3)2 的物质的量= 质量÷摩尔质量=3*10^-4 g ÷ 300 g/mol = 1*10^-6 mol 氮原子的物质的量 = 2 *PtCl2(NH3)2 的物质的量 = 2*10^-6 mol 个数 = 物质的量*阿伏加德罗常数 = 2*10^-6 ...

逄径服1001英语翻译毫无疑问(no doubt),史蒂夫已经意识(aware)到他患有癌症的事实.但是疾病似乎永远也阻止不了(stand in one's path)他的成功.史蒂夫一直... -
鬱贺璧19178905335 ______[答案] No doubt Steve has awared the truth that he has cancer,but disease can't stand in his path to success. Steve tries to cheer himself to look forward to towards and march to success hardly.

逄径服1001锎是锕系中的一种元素,1 mg锎(Cf)每秒钟约能释放出2.34*109个中子,在医学上常用作治疗恶性肿瘤的中子源.下列有关说法错误的是( ) -
鬱贺璧19178905335 ______[选项] A. 锎位于元素周期表第6周期 B. Cf和Cf互为同位素 C. Cf中,质子数和电子数均为98 D. Cf的中子数与质子数之差为56