为了查明案情,在必要的时候,经公安局长批准,可以进行侦查实验。( )
参考答案:对
神经肌肉对直流感应电刺激最敏感的是()。
A.直流电通电
B.直流电断电
C.感应电通电
D.感应电断电
E.无明显差别
He raised his _ to make the students hear him clearly. [ ]
A. voice
B. sound
C. noise
D. shout