木片

Situated anterior to the frontal bone.

又称前焦点。凸透镜前面的主焦点

METHODS Bleomycin-induced mutagen sensitivity was used to measure chromatid breaks of 52 cancer patients and 76 controls.

应用以博莱霉素为诱变剂的敏感性检测方法，检测52例肿瘤患者和76例对照的染色体断裂情况，并对部分样本进行G显带。