足三阳经的走向是()
A.从手走头
B.从头走足
C.从头走手
D.从足走头
E.从足走腹
参考答案:B
We all felt a sense of ______ when we saw so many overseas Chinese coming back safe and
sound from Libya. [ ]
A. security
B. relief
C. emergency
D. achievement
时间分辨荧光免疫分析所测定的特异光信号是
A.短寿命荧光
B.长寿命荧光
C.中寿命荧光
D.本底荧光
E.衰变荧光