低血钾影响神经、肌肉系统时,最突出的部位是()
A.腹肌
B.呼吸肌
C.四肢肌
D.膈肌
E.背部肌
参考答案:C
—_____, please?
—I think it's about five thirty. [ ]
A. What's the time
B. How old is the bird
C. What's the number of the car
与二氢黄酮反应后产生天蓝色荧光的是
A.HC1-Mg反应B.NaBH4反应C.MgAc2反应D.SrC2/NH3反应E.FeCl3反应