Rb基因是
A.结构基因B.操纵基因C.抑癌基因D.调节基因E.癌基因
参考答案:C
On no account to the teacher.
A.is this the first time he has lied
B.this is the first time he has lied
C.is this the first time has he lied
D.this is the first time he is lying
女性,26岁。头晕,乏力3年,维生素B12,叶酸治疗3个月,平时月经量较多。查血红蛋白75g/L,红细胞3.1×1012/L,白细胞4.5×109/L,血小板20×109/L,网织红细胞1.5%,尿胆原(-),大便隐血(-)。
本例最有可能出现的体征是()
A.颈淋巴结肿大
B.肝脾大
C.胸骨压痛
D.指(趾)甲变薄变脆
E.舌面光滑、舌 * * 萎缩