tRNA的二级结构是()。
A.双螺旋
B.超螺旋
C.线型
D.三叶草型
E.倒L型
参考答案:D
Some of my classmates were against the suggestion while others were _____ it.[ ]
A. in honour of
B. in memory of
C. in search of
D. in favor of
紧张型头痛的临床表现不包括()
A.头痛部位不定,可为双侧、单侧、全头部等不同部位
B.头痛性质为压迫感或紧箍样(非搏动样)
C.可伴有头昏、失眠、焦虑或抑郁等症状
D.体检可发现疼痛部位肌肉触痛或压痛点
E.头痛期间日常生活与工作常受到严重影响