【单选题】遗传密码的摆动性是指 。()
C.
反密码的第三位碱基与密码的第一位碱基不严格配对
【单选题】《幼儿园教育指导纲要》的教育理念倡导的是 的方法,在玩中学、学中玩,使学习成为一种乐趣。
【单选题】邓小平多次指出,在改革中,我们必须坚持的社会主义根本原则是( )。
【单选题】鲁迅在《狂人日记》中有如下描述:“我翻开历史一查,这历史没有年代,歪歪斜斜的每页上都写着‘仁义道德’几个字。我横竖睡不着,仔细看了半夜,才从字缝里看出字来,满本都写着两个字‘吃人’。”下列关于该书及所引材料的解读,最恰当的是
【单选题】A 31-year-old man experienced chest pain, became increasingly dyspneic and nauseated, and lost consciousness multiple times. Seven days after the appearance of these symptoms, he was found dead in his...
A.
Coronary atherosclerosis
B.
Dilated cardiomyopathy
C.
Disseminated tuberculosis
【单选题】《幼儿园教育指导纲要(试行)》的教育理念倡导的是( )的方法,在玩中学,学中玩,使学习成为一种乐趣。
【单选题】A 25-year-old man was found dead at home by the partment manager, who had been called by the decedent’s employer because of failure to report to work for the past 3 days. An external examination by th...
A.
Elevated anti-streptolysin O titer
B.
Positive ANCA serology
C.
Increased creatine kinase-MB(CK-MB)fraction
D.
High double-stranded DNA autoantibody titer
E.
Positive blood culture for Staphylococcus aureus
【单选题】A 25-year-old man was found dead at home by the apartment manager, who had been called by the decedent’s employer because of failure to report to work for the past 3 days. An external examination by ...
A.
Elevated anti–streptolysin O titer
B.
Positive ANCA serology
C.
Increased creatine kinase–MB (CK-MB) fraction
D.
High double-stranded DNA autoantibody titer
E.
Positive blood culture for Staphylococcus aureus
【简答题】【图片】图,一杆水平放置,且可饶O轴旋转,初始静止,现有一子弹垂直射向杆的底端,已知杆的质量为12千克,杆长2米,子弹质量4千克,速度为10米每秒,碰撞后子弹和杆粘在一起共同绕O轴转动,则他们一起的角动量为( )