辐射诱发遗传效应是
A.确定性效应B.随机性效应C.致死效应D.非致死效应E.非随机性效应
参考答案:B
解析:辐射诱发遗传效应是随机性效应。
He always does his homework ______ than his sister.[ ]
A. more careful
B. careful
C. more carefully
D. carefully
导致症状性癫痫及癫痫综合征的疾病包括()
A.中枢神经系统感染
B.颅脑外伤
C.代谢遗传性疾病
D.脑肿瘤
E.围产期损伤